#9554
Még a max6 helpjében ennyit találtam:
The Composite map type is made up of other maps, which are overlaid on top of one another using the alpha channel. For this type of map, use overlay images that already contain an alpha channel.
The controls for a Composite map are essentially a list of the maps it combines.
Viewports can display the multiple maps in a composite map. For multiple map display, the display driver must be OpenGL or Direct3D. The software display driver (Software Z Buffer) does not support multiple map display.
#9554