When you have chosen LightMap as the DirectX viewport shader, this rollout appears. The LightMap shader can display both a
base texture and a lighting map. Typically both these maps come from rendering to textures (texture baking) The base texture typically would be a completed map, a blend map, or a diffuse map. You can choose these map types, as well
as lighting map, to render as elements of a baked texture.
NoteIn order to use the LightMap shader, you must have
3ds Max configured to use the Direct3D graphics driver. To change the graphics driver configuration, refer to the
Viewport Preferences topic.
Interface
Base Texture group
- [Base Texture button]
-
Shows the name of the base texture. Click the button to display that material's parameters, and adjust them if necessary.
- [toggle]
-
When on, shaded viewports display the base texture. When off, it is not displayed.
If both the Base Texture and Light Map toggles are off, the material appears black in viewports.
- Mapping Channel
-
light map group
- [light map button]
-
Shows the name of the lighting map.
- [toggle]
-
When on, shaded viewports display the lighting map. When off, it is not displayed.
If both the Base Texture and Light Map toggles are off, the material appears black in viewports.
- Mapping Channel
-
Shows the map channel this texture uses.
Command entry: 
Material Editor 
Any material 