Raytraced reflections and refractions are typically rendered perfectly sharp, but in the real world, no perfect mirror or transparency exists. Instead, small-scale impurities reflect or refract light slightly, creating a blurry, glossy look. You can now easily render natural looking blurry reflections and refractions with mental ray for Maya.

To render blurry reflections and refractions

1. With mental ray selected as the renderer, turn Raytracing on in the Render Settings window (see Render Settings window).
2. In the mental ray tab of the desired material’s Attribute Editor, set the reflection and, or refraction blur attributes.

For detailed descriptions of the reflection and, or refraction blur attributes (in the mental ray section of the Shading Group node), see mental ray.