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My 3D models are consistent with each other in size and in the method used to define their appearance when rendering: the PBR (Physically Based Rendering). Using my 3D models, therefore, I have created several thousand "STOCK" images, very useful for creating illustrations, advertising graphics and other uses.

 

Showing here all the images that I have realized would not make sense, also because you can directly search the objects or the themes that interest you using the tools of search directly in my portfolio on Shutterstock (at this address: https://www.shutterstock.com/g/FrancescoMilanese ); here, instead, I will tell you how I can quickly realize many images of an object, after having imported the 3D model in a particular project of BLENDER 3D.

 

This tutorial has been created using version 2.80 of Blender 3D and is aimed at those who already have a good knowledge of this software.

 

The "STOCK" images can be of two types: single objects on a white (or transparent) background or real "photo shoots / virtual environments" with multiple objects (for example: a notebook, a pen and a cup resting on a wooden shelf). In this tutorial I will talk to you, through a practical example, only about the first case, because it can be realized with only one virtual scene and few tricks; a rendering of an entire scene or an environment can be realized starting from the information and from the BLENDER project provided in this tutorial, but in general it is a vast speech, that should be addressed in another tutorial.

 

The scene I usually use to render "isolated" objects can be downloaded by clicking on the button below

 

This virtual scene has been realized in Blender 3D 2.79 and tested also in Blender 3D 2.8, both with Cycles and with Eevee. In the ZIP file you find, in particular, two folders:

 

·   the folder with the actual scene file (the "film set" equipped with background image, cameras and light sources, to illuminate the object to be rendered);

·   the folder with the 3D model "message in a bottle 1", equipped with Textures PBR for the Cycles rendering engine (but in the package you can also find the Textures PBR of type "Metallic" and "Specular", which you can then also associate to an Eevee material, connecting the various images Metallic, Base Color, Normal, etc., to the inputs of the material PBR of Eevee).

 
 

THE "STOCK IMAGE SCENE" PROJECT

Let's examine in detail the scene as it appears at the opening, without having imported any 3D model inside.

IMG-1

As you can see, in the scene there is (among other objects, listed in the panel "Outliner") a plane that emits light, used as a background for each shot of the virtual camera.

This object is necessary for semi-transparent objects, just like the 3D model of the message in the bottle in the ZIP file of this tutorial. In the absence of that emitting plane, in fact, the semi-transparent objects would let you glimpse the colors of the image used as the background of the virtual universe; this is not always desirable, so by default I use the white plane as the background, but of course nothing prevents you to select it and delete it from the scene (left click on the object to select it, then press the X button and confirm by clicking on the "Delete").

 

In Blender 3D 2.8, the preview of the rendering is activated by pressing the Z key while the mouse cursor is in a "3D View" window, then selecting "Rendered" from the menu that will appear on the screen; in version 2.79, the key combination to press was SHIFT (or: MAIUSC) + Z.

IMG-2

In the panel "World" we notice that the "Surface", that is the background of the virtual universe, is an “HDR” image, supplied as external file.

I chose this image because it provides a photographic studio lighting setup, without particular shades of color or bright contrasts, but of course you can change that image to give the objects a different shading, if you prefer.

IMG-3

By default, this image is not visible, as the "Transparent" option in the "Films" section, in the "Render" panel, is selected; to display the background image (both in the preview and in the final rendering), disable this option.

IMG-4

In the "Output" panel we notice that the resolution of the image to be produced has been set to 2048x2048 pixels, but obviously this value can be modified according to your needs. The image to be produced will be 8 bit PNG with transparency ("RGBA") and I recommend leaving it this way, so you can easily isolate the transparent parts in post-production, for example in GIMP or other photo editing programs.

IMG-5

In the virtual scene we notice the presence of three Area light sources, called "Light 1 - Key", "Light 2 - Fill" and "Light 3 - Rim". These light sources have been arranged, as the names suggest, according to the lighting scheme "Studio Light", widely used in photography.

As for all the elements of the scene, however, they can be modified (for example, by changing their color, light intensity, position, size) or even removed from the scene, especially if their presence should introduce annoying light reflections on the most reflective objects (such as shiny metallic surfaces), or if, after changing the background image of “World”, they should introduce shading not consistent with the rest of the ambient lighting.

IMG-6

As I said before, in the scene there is also a plane ("Plane") equipped with an emitter material, so in fact this surface (which is placed in front of the virtual cameras, as we will see) provides a white and uniform illumination to the object.  It is a solution that provides a light background to the semi-transparent parts of the objects, if any; in its absence, these parts would show the color of the background image, which I prefer to avoid, but obviously you are free to remove this object, if you prefer.

As for the virtual cameras in the scene, I need to make a wider speech, because I also need to talk about the settings of the "Timeline" of the project.  The project includes 20 frames of animation and, for each of these frames, using the "Markers" of Blender's "Timeline" window, I set up different rendering cameras, which will then render the object from various points of view.  All this allows me to quickly create several 2D Stock Images starting from a single object and a single virtual scene.

IMG-7

 

Specifically:

l  In frame 3 we use the camera "Camera FRONT", type ORTHOGRAPHIC, which frames the scene (and, therefore, the object that will be inserted in the center of it) frontally, as the name suggests;

l  in frame 4 the camera "Camera LEFT" is used, which frames the object from the left, in ORTHOGRAPHIC mode;

l  in frame 5 the camera "Camera RIGHT" is used, which frames the object from the right, this time in PERSPECTIVE mode;

l  in frame 6 you use the camera "Camera TOP", which frames the object from above, in ORTHOGRAPHIC mode;

l  in all the other frames (1, 2; from 7 to 20) use is made of the virtual camera "Camera MAIN", of type PERSPECTIVE and that, among other things, is always oriented towards an object of type Empty, positioned in the center of the virtual scene, through which it is possible to easily orient the camera (it will be sufficient to select the Empty and move it to move the framing of the camera).

NOTE --- In a camera of type ORTHOGRAPHIC it doesn't make sense to move the camera forward or backward towards the framed object; to "zoom" (or better: to frame a wider or narrower portion of the scene, in this case), it is necessary instead to modify the value of the parameter "Orthographic Scale" of the camera, in the "Object Data" panel.

 

By importing a 3D model in the scene and resizing it to make it enter, in each frame, in the shots of the various virtual cameras, you can then quickly create 20 images, from various points of view and with different types of perspective: just set the output path of the images to be produced in the "Output" panel and click on "Animation" in the "Render" menu.

 
 

PRACTICAL EXAMPLE: "MESSAGE IN A BOTTLE 1"

Let's do a practical test now, using the 3D model "Message in a bottle 1" provided in the ZIP file attached to this tutorial.

Open the Blender project name "Stock image scene" and, from the menu "File", choose the item "Append".

In the "File Browser" window that will appear on the screen, choose the file "message_in_a_bottle_1.blend"; at this point, in the same window, click on "Object".

Select the four objects that will be listed ("bottle", "cork", "paper", "rope") and click on "Append from Library".

IMG-8

The four objects will appear in the 3D scene, positioned in the center (all my 3D models have the pinpoint, called "Origin", positioned in the center of the scene).

Most probably, the object you just imported will appear huge and you will have to resize it; since “cork”, “message” and “rope” are all sons of "bottle", select the object "bottle" and scale / shrink it (by pressing the S key and moving the mouse; then, confirm the operation with a click of the left mouse button) so that it enters the frame; eventually, move it by pressing in succession the G Z keys and moving the mouse (to then confirm with a click of the left mouse button).

IMG-9

Immediately after resizing and placing the object within the frame, remember to select all the objects in the scene (by pressing the A key while the mouse cursor is in a "3D View" window), press the I key and choose "LocRotScale" from the "Insert KeyFrame Menu", in order to record these settings for the current frame.

IMG-10

This operation is very important and must be done in each of the frames of the animation to be generated, so I will repeat this recommendation afterwards.

The “Render Engine” set for rendering should be "Cycles", in the tab "Render", tab "Render - Scene"; the 3D model "Message in a bottle 1" has, inside the Blend file, the Textures for the rendering engine "Cycles", but you can create materials for “Eevee using” the Textures PBR Metals present in the “Multi Engine Texture Pack” folder, provided in the ZIP file.

IMG-11

Since the BLEND file of this 3D model, like all the ones I made, comes with the Textures already embedded in the file, the object is actually ready to be rendered, as you can see by activating the preview rendering (in Blender 3D 2.8, press the Z button while the mouse is in the 3D window, then choose "Rendered").

IMG-12

 

All you have to do now is to set the objects in the center of the shots for all the other frames of the animation; summarizing, for each frame of the animation, all you have to do is:

1. Resize and place objects in the shots at will, using frames from number 7 to number 20 in order to obtain particular angles or close-ups on some elements or details;

2. Press the A key while the mouse cursor is in a "3D View" window to select all the objects in the scene;

3. Press the I key and choose "LocRotScale" from the "Insert KeyFrame Menu" that will appear on the screen.

ATTENTION --- Do steps 2 and 3 for each frame even if you have not resized or moved any object in the current frame: recording, at another time, two frames before and after the current frame, could unintentionally create an interpolation (ie: an animation) and transform the objects in intermediate frames, if you have not recorded them explicitly with the operations in steps 2 and 3.

IMG-13

After setting all the frames of your animation, open the "Output" panel and, in the "Output" section, set the path to disk where you want to save the files (which I recommend setting in "PNG" format with "RGBA" color; more experienced users can choose the "OpenEXR" format, to save much more information in the images of the various frames).

IMG-14

Make a copy of this project by saving it as it is (from the "File" menu, choose "Save As"): it's better to be forethought, before starting a rendering!

IMG-15

Now you can send the project to a remote Render Farm for rendering, or open the "Render" menu, click on "Render Animation" and... drink a coffee or get some sleep while you wait!

IMG-16

 

As I said at the beginning of this tutorial, that's how I created thousands of Stock images of objects, both isolated (on white background) and in compositions (importing more objects in the rendering scene, through "Append"), using my 3D models "STOCK". This operation is possible because of the coherence with which I realize my 3D models: all the models have real world dimensions (or in any case proportionate to each other, in the case of microscopic objects or astronomical ones) and are all provided with PBR textures provided in the Multi Engine Texture Pack package attached to each 3D model.

 

 

In these Tutorials we’ll see how to use Multi Engine Textures Pack’s Textures, present in all of the 3D models’ packages, with the materials for the PBR (Physically Based Rendering) of some visualizations and the 3D rendering programs; in particular, we’ll see:

In all of the Tutorials, I’ll show some images using one of my 3D models, the “clinical thermometer”, visible in the next image (which was rendered in Cycles or Eevee for 3D Blender using a scene with 3 light sources and a Texture’s image as a background of the virtual universe).

The object that I’ll use in these tutorials is composed by two objects: the “glass” for the transparent parts and the “frame” for the rest.



I’ve decided to use this model because it shows two different materials with different features: the first one (the frame”) is opaque and shows both the metallic and the dielectric parts; the second one (the glass”) is transparent, so, it’ll allow us to see how to manage the transparency in the software that have been used.

The techniques discussed using this 3D model can be applied to all of my 3D models which were created with my standard:

  • one Material for each Object;

  • the Textures’ map (“UV Layout”) without overlays;

  • the FBX interchange format included in the package;

  • the BLEND file with PBR4 Material and PBR Textures for Cycles included in the file;

and, obviously,

  • the MULTI ENGINE TEXTURE PACK folder which carries the PBR Textures for the different rendering engines and for the Workflow Metallic and Specular (PBR materials).

 


 

The Textures for the PBR4 Material in Cycles / Eevee (Blender 3D 2.7x - 2.8x)

You’ll always find a BLEND file created with a 2.7x version (or next), in the 3D models’ ZIP packages. This file has got the Textures images associated with the Materials present in the scene.

The BLEND file present in the package has got always Textures images packed up inside for the many Materials present in the scene.



So, if you want to use the object with the textures that I provided, you simply have to put the object in your Blender scene. Let’s see how.

In your Blender project’s scene, in which you want to put the object in the way as it has been provided in the package, select Append from the File menu.

Select APPEND from the FILE menu in the Blender project, in which you want to put the object.



At this point, in the Blender’s File Browser window, you have to “navigate” up to importing the desired Objects in this way:

  1. find and click on the File that you’re interested in, from his path on disk;

  2. inside the file, click on the Object section;

  3. select all the objects you want to import and click on Append in the form.

APPEND phases; particularly, while uploading the object with the Materials and the Textures, pay attention to select OBJECT.



So, the objects will be inserted in the current form, equipped with the Materials and the original Textures, ready to be transformed as desired.

The object inserted in the scene is equipped with the Materials and the original Textures.



If you import the object in an empty scene, don’t forget to activate the light’s sources or at least a color in the background, or you won’t be able to see anything; the next image has been obtained putting the object in a scene made of a white surface, 3 Area Lamp light’s sources and an HDR panoramic image for the background of the virtual universe.

Rendering preview of a 3D Blender scene (Cycles as rendering engine), with the lights and a background image correctly set.



Instead, if you want to create a new Texture’s set, for example in Substance Painter, and you want to use the PBR4 node from the material that I’ve provided you, you have to create the Textures in a way that they can be compatible with the PBR4 node. This operation has been described in another Tutorial of this basic guide (“Export the Textures for PBR4 material of Cycles from Substance Painter 2019”).

IMPORTANT NOTE - (SEMI) TRANSPARENT OBJECTS

The PBR4 node of my Materials has got a value called “Abs Strength that means “Absorption Strength” and serves to adjust the light absorption intensity when this one goes through a semitransparent material, colored or not.

Pay attention at the material’s parameters.



For the colored semitransparent materials such as jelly, wine, and not completely transparent fluids in general, this parameter must have values greater than 1 (which is the default value), but for the water, the diamonds or “pure” glasses you have to take it down to 0, or the object will look dark.

Furthermore, you’ll have to correctly set the IOR parameter, which shows the material’s refractive index, and that you can regain quickly with a simple research on the Internet; for example, for a diamond, the best value you’ll find is between 2.1 and 2.4.


 

How to export the Textures for the Cycles / Eevee PBR4 Material from Substance Painter 2019

In this tutorial we’ll see how to configure the Texture’s exportation on Substance Painter to get the three necessary Textures for the Cycles / Eevee PBR4 material for the 3D Blender.

This is useful because - as described in another Tutorial - all of my BLEND models are equipped with that material and, if you want to keep on using it (to keep the coherency with the other objects in the scene) but you want to change the Textures (for example, because youve recreated them and youve added a logo, or because you have created them from scratch) you have to know how to export the necessary Textures images.

This tutorial has been done with Substance Painter's 2019 version, and it’s for those who has already got a good knowledge of the program (it’s not a basic tutorial).

The PBR4 material in Cycles / Eevee particularly uses 3 images:

  1. an image for the base color (Albedo or Base Color);

  2. an image like Normal Map;

  3. an image composed of four other different images, in grayscale, stored in the four RGBA channels (Red, Green, Blue, Alpha) of a single PNG image.

The PBR4 node in Cycles /Eevee uses 3 Textures images; particularly, the ORMA image is composed in reality of 4 images (Occlusion, Roughness, Metallic, Alpha), linked to the image’s four RGBA channels.



So, in our Substance project we have an object which is completely texturized and ready for the exportation. We choose Export Textures in the Substance Painter’s menu.

We choose Export Textures from the Substance Painter’s menu.



Let’s move in the CONFIGURATION tab in the window that will show up on screen. Here we can choose to create a new exportation Preset for the PBR4 or to select one which is already existent and add to the queue the three necessary Textures, so we can have the Preset’s original Textures and the Textures for the PBR4, after the exportation.

The Configuration form in Export Document (from Export Textures).



Anyway, to create the three images, we need:

  1. an RGB image for the base color; we write “cycles_$textureSet_BaseColor” in this Texture’s Output Map; we won’t put transparency information (Opacity) in this Texture;

  2. an R+G+B+A image for the ORMA Texture (Occlusion, Roughness, Metallic, Alpha); so, we need 4 distinct information channels to put in four different maps in just one Texture; we write “cycles_$textureSet_ORMA”in this Texture’s Output Map field;

  3. an RGB image for the Normal Map; we write “cycles_$textureSet_normal” for this Texture’s Output Map field.

The three images that you need to create for the exportation.



At this point, we have to drag the maps that are in the right part of the form, respectively inside of the Output Maps’ Slot; particularly, we drag:

  • Input Maps – Base Color in the BaseColor Texture;

  • Input Maps – Ambient Occlusion in the ORMA Texture’s “R" slot;

  • Input Maps – Roughness in the ORMA Texture’s “G” slot;

  • Input Maps – Metallic in the ORMA Texture’s “B” slot;

  • Input Maps – Opacity in the ORMA Texture’s “A” slot;

  • Converted Maps – Normal OpenGL in the normal Texture.

All of the maps that we’re interested into are part of the Input Maps section, exception given for the Normal OpenGL map, which is in the Converted Maps section.

The associations that need to be done between Substance Painter’s maps and the Textures that need to be created.



Our exportation Preset is ready; obviously, at this point, we have to go back to the Export form in the EXPORT DOCUMENT window, and, as it’s showed in the next image, set:

  1. the path to disk to put in the exported files (the three texture images);

  2. the 8-bit PNG format (because we need an image with a transparency channel; so, for example, the JPG can’t be used);

  3. the just created configuration (the Preset) that shows the settings for the 3 images that need to be exported for Cycles;

  4. the images’ resolution that needs to be created (for example, in my case, 2048x2048).

The EXPORT form in the EXPORT DOCUMENT window.



So, the images will be exported in the chosen path to disk and ready to be linked to the PBR4 Material in Cycles / Eevee.


 

How to recreate the object’s PBR Material with Specular Workflow in Marmoset Toolbag 3

In the MULTI ENGINE TEXTURES PACK folder there are, among others, the Textures to recreate the PBR Materials with the Specular and the Metallic Workflow. In this tutorial we’ll see how to recreate a PBR Material with the Specular Workflow in Marmoset Toolbag.

First of all, we import the 3D model’s FBX file in a new Marmoset Toolbag project: we just have to drag the FBX file inside the 3D View of the program.

The program will immediately recognize the Materials, linking them to the Specular Workflow; in this case, there are two Materials: the “glass” (the thermometer’s transparent parts) and the “frame” (the rest of the thermometer).

Importing the model’s FBX file in the 3D scene; Marmoset Toolbag will immediately recognize the Materials (listed in the top right corner of the image); in this case, there are two of them: the “glass” and the “frame”.



We have to make a double click on frame”, then we open a File Browser window and enter in the folder that has got the Textures inside of the package.

At this point we have to drag the images with the “PBR-SpecGloss_” and the Material’s name, so, we have to drag them in Marmoset Toolbag in this way:

  • the Diffuse in Albedo image – the Albedo Map;

  • the Glossiness in Microsurface image – the Gloss Map;

  • the Normal in Surface image – the Normal Map;

  • the Specular in Reflectivity image – the Specular Map.

We can leave out the Height image.

Setting the Textures for the PBR Specular Material in Marmoset Toolbag.



Regarding the “glass” Material, the same considerations on how to drag and link the maps are valid, but we have to make another operation as well: we have to click on the Transparency form, at the right bottom, to select Refraction.

The Transparency form will open and we’ll have to set in it especially the Index of Refraction value (I recommend you to lower it as much as possible; for example, to 1.05 or 1.02) and, if necessary, uncheck the “Use Microsurface” checkbox.

Set Refraction and Transparency for the semitransparent objects.



Obviously, the object’s final look will be also influenced by the image which was used as an environmental lighting; to create the image below, I’ve used the “Indoor Fluorescents” Preset and I’ve lowered the background intensity (Backdrop Brightness) to make the object stand out.

The Environmental lighting’s settings and the background of the 3D scene in Marmoset Toolbag 3.

 


How to recreate the object’s PBR Material with Metallic Workflow in Substance Painter 2019

In the MULTI ENGINE TEXTURES PACK folder, there are, among others, the Textures to recreate the PBR Materials with the Specular Workflow and the Metallic one. In this tutorial we’ll see how to recreate a PBR Material with the Metallic Workflow in Substance Painter 2019; if you want to see how to recreate the Material with the Specular Workflow, look my tutorial on Marmoset Toolbag 3.

First of all, we import the FBX file of the 3D model in a new Substance Painter project, dragging the FBX file inside the program’s 3D View. Substance Painter will immediately ask us to specify the settings to create a new project; we can confirm the default settings and go on.

The project creation in Substance Painter 2019.



Substance Painter will immediately recognize the Materials linked to the object and will put them in the Texture Set List section; in this case we have two materials: the “glass” (thermometer’s transparent parts) and the “frame” (the rest of the thermometer).

The first thing to do is to remove the empty Layer automatically created by Substance Painter from the Materials (there are two of them, in this case); once it has been done, we must create a FILL LAYER for each Material.

For each Material in the Texture Set List, delete the default Layer and create a new Fill Layer.



At this point, we have to import the Texture images in the project, so, we choose File - Import Resources, and then, (in the Import Resources window that will appear on screen), we select the Textures with the prefix “PBR-MetalRough_” and the Material’s name (“glass” and “frame” in my case).

We can avoid importing the HEIGHT Textures.

Import the Textures in the project, choosing those with the MetalRough prefix. We can avoid importing the HEIGHT images.



Before clicking on “Import”, we have to change the resource type from Undefined to Texture; so, in the “Import your resources to:” selector, we choose to import the images in the Current Session.

The Textures’ importation settings.



At this point, for each Material, we can begin to set the Textures in the Fill Layer’s slots that we’ve created, following the matches between the images’ names and the PROPERTIES – FILL slots (Base Color, Metallic, Roughness, Normal).

The matches between the imported images and the Material’s PROPERTIES - FILL slots.



A note for the semi-transparent materials, such as glass: my package does NOT include a Texture for the semi-transparency, which is called Alpha or Opacity, so, you’ll have to manually set the value (or creating a new Texture for this purpose) in the Material’s Opacity camp, in the PROPERTIES – FILL form.

Once you’ve done all of this, you’ll have the Substance Materials just like I’ve created them, and, starting from this base, you’ll be able to do all the changes that you’ll think will be more appropriate (adding logos, changing colors or any other material’s properties in different places, etc.).

The Materials can be exported as a generic PBR, for Unity, for V-Ray, for Adobe Dimension, for Unreal and other programs using the Substance Painter 2019’s native Presets; but, if you want to create the Textures for the PBR4 Material of Cycles, using the BLEND file present in the packages, you’ll have to create a special export Preset for Substance.

The instructions on how to create the Preset for the PBR4 in Cycles are in another Tutorial of this guide.


Import the PBR Textures for the Materials in Unity 2019 (Metallic Workflow)

To use the Texture in Unity 5 Standard Shader (that uses the PBR Metallic Workflow), first of all we have to drag the object’s FBX file that is inside of the Project tab, so that it can be put in the current project.

The object will look as made of two geometries and two Materials, that at the beginning will be grey without any Texture.

The FBX file imported in Unity will have the Materials empty, without any Texture.



Right now, we can’t change the Materials’ settings, because Unity imports the FBX files giving them the Materials present in the file, as it’s visible in the Inspector’s Materials form for the imported object: here, the “Material Creation Mode” is set on “Import (Legacy)”, while “Location” is set on “Use Embedded Materials”.

As a Default, Unity tries to import the Materials and the Textures directly from the FBX files; however, in our case, there are only the Materials, but the Textures images are missing.



So, let's click on “Use Embedded Materials” option (“Location” slot), change it to “Use External Materials (Legacy)” and click on Apply to apply the changes.

Let's select the "Use External Materials (Legacy)" option for Location and apply the changes.



Unity will create a folder called Materials and will put in it the object’s Materials, but this time we’ll can change them putting them in the Textures. However, the Materials will be linked to the object, so, after you’ve put in a copy of the object in your Scene (by dragging it from the Project to the Inspector), you’ll immediately see the changes.

The new Materials, created in the Materials folder, will be linked to the object and we will be able to change them.



At this point we can select the images files with the “Unity5-Metallic” prefix from the Multi Engine Texture Pack folder and drag them in the Materials folder in the Project tab; in particular, we’ll have to drag 3 images for each Material (so, in my example, 6 images, as we have 2 Materials).

Let's drag the images with the "Unity5-Metallic" prefix from the Multi Engine Texture Pack folder to the Project’s Materials folder.



Setting the Textures for each Material is very easy, because we just have to drag:

  • the textures with the AlbedoTransparency suffix in the Material channel’s slot;

  • the texture with the MetallicSmoothness suffix in the Material channel’s slot;

  • the texture with the Normal suffix in the Material channel’s slot; in this last case, we’ll have to click on the “Fix Now” button that will appear in the Material form, to mark the image as a Normal Map.

Drag the Textures in their Material’s slots and click on the “Fix Now” button for the Normal Map.



There’s no need to do anything else to set a basic opaque Material; regarding the Materials with transparency, instead, after making these links, it’s necessary to change the “Rendering Mode” parameter, in the top of the Material Inspector form, from “Opaque” (the default value) to “Transparent”.

Regarding the Materials with transparency, once the three Textures images are combined (as it happens with the opaque Materials), it’ll be necessary to change the Rendering Mode from Opaque to Transparent.


Importing the PBR Textures for the Materials in Unreal Engine (versions 4.x)

To use the model in the Unreal Engine 4.x, first of all, we have to drag the object’s FBX file inside of the Content Browser of our Unreal project.

We click on “Import All” in the “FBX Import Options” window and we keep on going disregarding any warnings about the “Smoothing Groups” absence in the models.

Import the FBX file in the Content Browser of the Unreal Project.



The game engine will immediately recognize the present objects in the FBX file (in our example, there are two of them: the “frame” and the “glass”) and the related Materials, but these will be empty at the beginning; dragging the objects in the 3D scene, indeed, we’ll see them uniformly, without any Texture.

The objects and the Materials uploaded in Unreal.



In this tutorial, as in those for the other programs, we’ll see how to configure two different Materials types: opaque (metallic, dielectric or mixed) ones and semi-transparent ones; in both of them, the combinations to do for the Textures provided in the package are the same, so let’s start talking about the opaque materials.

First of all, we drag the textures with the UNREAL prefix from Multi Engine Texture Pack folder to the project’s Content Browser; we have 3 images for each Material, so, in my example, I’ll import 6 of them.

NOTE: during the Normal Textures importation, Unreal can inform us that it has converted automatically the image in “Normal Map”, as it’s visible in the panel at the bottom right in the next image; we can confirm the Unreal’s operation by clicking on the “OK” button.

Drag the Textures Images with the Unreal prefix in the project’s Content Browser; click on OK if Unreal inform us that it has transformed the Normal Maps.



Once we’ve imported the project’s images too, we have to make a double click on a Material to insert the Texture images; as a default, the Material’s node is linked to an empty one: we have to select it, delete it and drag the three Textures images of this Material from the Content Browser to the Materials’ editor.

Let's insert the three Textures images in the Materials’ editor for the selected Material. Let's delete the default empty nodes.



In this example, I’m selecting the “frame” Material (the opaque parts, both metallic and dielectric), linking the Textures in this way:

  • the BaseColor texture composite output (RGBA) to the Material node’s BaseColor input;

  • the OcclusionRoughnessMetallic Texture’s “R” output to the Material node’s Ambient Occlusion input;

  • the OcclusionRoughnessMetallic Texture’s “G” output to the Material node’s Roughness input;

  • the OcclusionRoughnessMetallic Texture’s “B” output to the Material’s node Metallic input;

  • the Normal Texture’s composite (RGBA) output to the Material node’s Normal Input.

Let's link the three Texture images’ outputs to the Material node’s input ports.



Let's save the changes to apply them and go back to the Main Editor of the program.

Let’s take a look now to the semitransparent Materials (in this example, the “glass”). We have to double click on the new Material to enter the Materials’ editor again.

We need to link the Textures to the Material’s node exactly like the opaque Materials, so, first of all, we have to do this operation.

However, we have to make also another link: let's take the Alpha output (the last one) in the Texture Base Color and link it to the Material node’s Opacity input.

Let's use the same Textures and Nodes configuration for the (semi-)transparent materials, too; however, in this case, we must link also the BaseColor image’s Alpha output to the Material node’s Opacity input.



Once we’ve saved the changes, however, we’ll see that the object will look opaque.

This is due by the fact that, on the left of the Materials’ editor, we have to set the material’s “Blend Mode” from Opaque (default value) to Translucent for the selected material; moreover, in the left bottom of the form, we have to change the “Lighting Mode” parameter to “Surface Forward Shading”.

For the semi-transparent Materials, it’s necessary to set the Blend Mode on Translucent and the Lighting Mode on Surface Forward Shading.



Again, we save the changes and go back to the Main Editor; now, the semi-transparent material will be correctly showed in the scene.

The final result.



NOTE --- In case the object looks “too transparent” (that is: invisible), you can link a Scalar node to the Material node’s Opacity input and set the Scalar value, for example, at 0.1 or 0.2, making the object semi-transparent (but not too much... just enough so it’s possible to see it).


Importing the PBR Textures for the Materials in V-Ray 4.20 for 3D Studio MAX 2020

In this tutorial we’ll see how to configure the PBR Textures (attached in the Multi Engine Textures Pack package) in a V-Ray Next Update 2 (version 4.20) material for 3D Studio MAX 2020.

To create the renderings that are visible in this tutorial, I’ve put a light source and a background image in the 3D Studio MAX project; without these elements, indeed, the renderings would appear black. I’ve added also a plan (a grey one), so, we can put the object on it to see the shadows.

The initial scene: besides the objects, there are a plan, a light source and the virtual camera.



Let’s start from the easiest material, theframe”, which is opaque.

Let's create a VRayMtl material and assign it to the “frame” object in the scene.

Therefore, let's click on the square boxes next to the “Diffuse”, “Reflect” and “Reflect Glossiness” slots, in the “Basic Parameter” material’s section. A “Material / Map Browser” window will appear, in which we’ll have to specify that we want to create a BITMAP for that channel. We’ll have to specify the Texture image we want to use, too; we can select the right image using the suffix present in the file’s name to recognize it; for example, for the “frame” Diffuse’s slots, we’ll have to set the “vray_frame_diffuse.png” Texture.

Of the four maps that we’ll use, three of them will be of Bitmap type and we’ll can easily recognize them from the file’s names present in the Multi Engine Texture Pack.



To set the fourth image, the Normal Map, we can go on in this way: let's open the material’s Maps section and click on the Bump slot, then let's change it to the VrayNormalMap type. Inside of this object we’ll can set, in the “Normal Map” slot, the corresponding texture (in this case: “vray_frame_normal.png”).

To set the Normal Map, let's click on Bump and change the type to VRayNormalMap, then let's drag the Normal Texture in the Normal Map slot.



As you can see, to set an opaque Material in V-Ray with the PBR Textures provided in the Multi Engine Texture Pack, we just have to link four PNG images that we can recognize from their names (Diffuse, Reflection, Reflection Glossiness, Normal).

Regarding the “glass” material (and for all of the Materials that have transparency in general), we have to do the same basic operations for the “frame” opaque material (that is: combining the four Textures images to the respective Material’s slots); after that, we’ll have to do three simple operations in the “Reflect” section of the “Basic Parameters” tab:

  • check the “Affect Shadows” checkbox; otherwise the material might look black;

  • change the “Refract Color” in pure white, or, in case it appears too transparent, in a very light grey, almost white;

  • lower the “IOR” value; for example, to 1.04.

To set a semi-transparent VRayMtl material, once we've uploaded the four Textures images as it has been done for the opaque materials, we have to pay attention to the Refract Color, Refract IO and Affect Shadows settings, in the material’s Basic Parameters section.



Once this has been done, the Materials will be correctly set.

The rendered image.



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