Diffuse Roughness Map

You can use 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.

• Material Editor > Standard Material > Maps rollout > Diff. Roughness button (appears only for the Oren-Nayar-Blinn or Multi-Level shaders)
• Material Editor > Raytrace Material > Maps rollout > ONB Rough. button
• Material Editor > Arch & Design Material > General Maps rollout > Main Maps group > Diffuse Roughness button
• Material Editor > Other materials that have a Roughness component

Roughness map adds a textured pattern to the vase.

Note: For a Raytrace material, the Roughness parameter is available only with the Oren-Nayar-Blinn shader. For a Standard material, it is available with the Oren-Nayar-Blinn and Multi-Level shaders.

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.

Procedures

To map the roughness value:

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

   3ds Max opens the Material/Map Browser.

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

   (If you choose Bitmap as the map type, 3ds Max opens a file dialog that lets you choose the image file.)

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

Alternatively, you can use the Slate Material Editor to wire a map node to the Diffuse Roughness component.