How to Use Vray 1.5 RC3 for Realistic Lighting and Rendering in 3DS Max
Vray 1.5 RC3 is a powerful rendering engine that can produce photorealistic images and animations in 3DS Max. It has many features and options that allow you to customize the look and feel of your scenes, such as global illumination, physical sun and sky,
HDRI, materials, cameras, lights, and more. In this article, we will show you how to use Vray 1.5 RC3 for realistic lighting and rendering in 3DS Max.

Step 1: Set up the Render Settings
The first step is to set up the render settings for Vray 1.5 RC3 in 3DS Max. To do this, open the Render Setup dialog box (shortcut key F10) and in the Common tab, scroll down to Assign Renderer and choose Vray Adv.1.5 RC3. Then go to the Renderer tab
and adjust the settings as shown below:

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Image sampler: Adaptive QMC
Antialiasing filter: Area
Color mapping: Reinhard
Indirect illumination: On
Primary bounces: Irradiance map
Secondary bounces: Light cache
Ambient occlusion: On

These settings will give you a good and fast render for previewing purposes. You can tweak them later for higher quality and accuracy.

Step 2: Add an HDRI to the Environment
The next step is to add an HDRI (High Dynamic Range Image) to the environment. An HDRI is an image that contains a wide range of brightness values, from very dark to very bright, that can simulate realistic lighting conditions. To add an HDRI to the
environment, go to the Renderer tab and scroll down to the Environment section. Switch on the GI Environment (skylight) override and click on None. It will show up a Material Browser dialog. Scroll down to find and select VrayHDRI.

Now, this is not going to do any good to us, as here we don't have any option to load a specific HDRI. This will keep the VrayHDRI map empty! So what we do is; open the 3DS Max Material Editor (shortcut key M) and in an empty material slot drag and drop
this VrayHDRI map from the renderer to this slot and say Instance. This brings up the VrayHDRI map in your Material Editor, where you can play around with the map, and as it has been Instanced with that in the Renderer, every settings you do will get
reflected in the rendering output.

So, click on browse and load whichever HDRI is suitable for you. For this example, we will use an HDRI called Snowfield[^1^]. You can adjust the parameters of the VrayHDRI map such as rotation, horizontal flip, gamma, etc. to match your scene.

Step 3: Add a Physical Sun and Sky System
The third step is to add a physical sun and sky system to the scene. This is a feature of Vray 1.5 RC3 that allows you to create realistic daylight effects based on atmospheric conditions and geographical location. To add a physical sun and sky system,
go to Create > Lights > VRay > VRaySun. Click and drag in the viewport to place the sun light in your scene. A dialog box will pop up asking you if you want to automatically add a VRaySky environment map. Click Yes.

This will create a VRaySky map in your environment slot that is linked to your VRaySun light. You can modify the parameters of both the VRaySun light and the VRaySky map such as size multiplier, turbidity, ozone, etc. to change the appearance of the sun
and sky.



Step 4: Add Materials, Cameras, and Lights
The final step is to add materials, cameras, and lights to your scene. You can use any of the Vray materials available in the Material Editor or create your own using maps and textures
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