Autodesk 12812-051462-9011 User Guide 3 - Page 984

3ds Max Materials in mental ray Renderings For the most part, the mental ray renderer treats 3ds Max maps and materials the same way the default scanline renderer does. The exceptions are listed below. In general, if the mental ray renderer does not recognize a map or material, it renders it as opaque black. WARNING The mental ray renderer does not necessarily support maps or materials provided as plug-ins from third-party vendors. It supports third-party maps and materials only if the vendor has explicitly used the mental ray SDK to add support for the mental ray format. Unless the third-party vendor clearly specifies mental ray support, you should assume the map or material is unsupported, and will render as black. See also: ■ mental ray Renderer on page 6230 ■ Getting Good Results with mental ray Rendering on page 6235 Issues for Reflections and Refractions The maps used to create reflections or refractions, Flat Mirror, Raytrace, Reflect/Refract, and Thin Wall Refraction, are supported by the mental ray renderer. However, the mental ray renderer simply uses these maps as indications to use its own ray-tracing method, leading to some restrictions on which parameters are supported, as described in the sections "Materials" and "Maps," below. Map Blurring When reflections and refractions are ray traced, applying Blur (or Distortion, in Flat Mirror) does not apply to reflections or refractions of environment maps. In general, Blur and Distortion render differently than they do with the default scanline renderer, and you might have to experiment with parameter values to get a comparable rendering result. TIP If Blur effects are not rendering well with the mental ray renderer, try increasing the Maximum number of samples in the Renderer panel > Sampling Quality Rollout on page 6272. mental ray Renderer | 6239