All texture coordinates are divided by the last element before being passed to the rasterizer. For example, if this flag is specified with the Count3 flag, the first and second texture coordinates are divided by the third coordinate before being passed to the rasterizer.
Count4
4
4-D texture coordinates are passed to the rasterizer.
Count3
3
3-D texture coordinates are passed to the rasterizer.
Count2
2
2-D texture coordinates are passed to the rasterizer.
Count1
1
1-D texture coordinates are passed to the rasterizer.
Disable
0
Texture coordinates are passed directly to the rasterizer.
