The color of the grid
lines. The default color is white.
Filler_color
The color of the spaces
between the grid lines. The default color is black.
Uwidth, Vwidth
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.
Contrast
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.