The color of the grid
lines. The default color is white.
The color of the spaces
between the grid lines. The default color is black.
The width of the grid
lines in the U and V parametric directions. The valid range is 0
to 1. The slider range is 0 to 0.5. The default value is 0.1.
The contrast between
the Line Color and the Filler Color.
The valid/slider range is 0 (the two colors are averaged over the
entire texture) to 1. The default value is 1.