This allows the user to have advanced control over the exact sun angle given a particular time of day and geographic location, or you can manually place the angle of the sun if specifics aren’t important. To do so, I use the sun tool that comes with Vray for Rhino. I then add an exterior light to simulate the sun coming in from each window. Once the lighting is set correctly, you will then have a realistic feeling for what the materials are doing and how they react to subtle changes. The reason to implement the lights before adding material is simple, with good lighting the materials will fall into their own. Texture Enable – Enables or disables the specified GI texture.The next major step is to place lights in the scene. Note that Texture Enable must be enabled to have an effect on the scene.

Texture – Specifies a color or texture for the specified override. On – Enables or disables the specified GI environment override. The above GI environment overrides have the following common controls: Secondary Matte – Specifies a color/texture map to override the Environment rays affecting Matte objects. This color is ignored if there is an environment texture specified. Refraction – Specifies a color/texture map to override the Environment refraction rays. If you enable the Refraction override, then this group affects only reflections. If you do not enable the Refraction override, this group of controls affects both reflections and refractions.

Note that you can also override the reflection environment on a per material basis (see Generic) or a per map basis. Reflection – Specifies a color/texture map to override the Environment reflection rays. Note that Global Illumination (GI) must be enabled. The effect of changing the GI environment is similar to a dome light. GI (skylight) – Specifies a color/texture map to override the Environment GI rays. If a texture is selected, it overrides the color as long as the texture checkbox is enabled. Press the checkerboard button to select a texture. Background – Specifies a color/texture map to be visible in the background and used during GI and reflection/refraction calculations.

Rhino vray render environment setting