If you want more control, try CMInterpolate combine mode.
Otherwise, I think MModulate will make the most sense - then just adjust the range of the greyscale values in the texture with GIMP or so.
If you want more control, try CMInterpolate combine mode.
Otherwise, I think MModulate will make the most sense - then just adjust the range of the greyscale values in the texture with GIMP or so.