So now V-Ray knows that while calculating the GI it has to use the GI material (in this case: VRayMtl with Diffuse color (128, 128, 128) and during rendering it uses the Base material (in this case: the wooden VRayMtl). The result of that is quite different from the previous render as the Color Bleeding is gone. Of course this depends entirely on your choice for the GI material. The rest of the scene objects keep the default gray VRayMtl.

In the second image, the scene is rendered with a VRayOverride GI material assigned to the floor. The VRayOverrideMtl contains in itself the initial two V-Ray materials: the wooden VRayMtl as base and the default VRayMtl as GI material. This is due to the color bleeding, generated by the GI calculations. In the first image, it is visible that all walls, objects, and the ceiling are rendered in some light brown color, despite having a light-gray material assigned to them. This simple interior scene represents a room lit by two rectangle VRayLights - one hidden top light and another back fill light - as well as by three disc VRayLights for the pendant lamps above the sinks.Ī wooden VRayMtl from the Chaos Cosmos library is applied on the floor, and a default VRayMtl with Diffuse color (128, 128, 128) is applied on the rest of the scene objects, except for the glass objects (mirror and pendant lamp plafonds).

Vray mtl 3ds max