Diffuse Roughness Mapping
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Material Editor Standard material Shader Basic Parameters rollout Oren-Nayar-Blinn or Multi-Level shader Maps rollout Diff. Roughness button

You can select a bitmap file or procedural map to control the Roughness parameter on the Basic Parameters rollout. White pixels in the map increase roughness. Black pixels reduce roughness to 0. Intermediate values adjust roughness accordingly.

Roughness map adds a textured pattern to the vase.

NoteThe Roughness parameter is available only with the Oren-Nayar-Blinn and Multi-Level shaders, and with the Arch & Design material (mental ray).

Reducing the Amount of the Diffuse Roughness map reduces the map's effect, and increases the effect of the Roughness value on the Basic Parameters rollout. When the Amount is 0 percent, the map isn't used at all.


To map the roughness value:

  1. Click the Map button for Diffuse Roughness (Diff. Roughness).

    The Material/Map Browser is displayed.

  2. Choose from the list of map types, and then click OK.

    The Material Editor is now at the map level, and displays controls for the map parameters.

  3. Use the map controls to set up the map.