Postby tomh » Thu Apr 29, 2010 9:39 am
Kjorhrf, that is the correct behavour.
the mask uses the HSLA colour scheem (hue, saturation lightness.
For masks, it uses the L and A values.
the thing to remember is that it uses the lightness value of the colour as the mask. Alpha (transparency also counts)
so: black=0 ,white =255
fAlpha =0 (fully transparent), Alpha=255 = fully obaque
then it obaquacy of the mask is LA, so if the mask is white /and/ A=255, the object masked will be fully opaque. if you use black in the mask, or set the opacacy of the mask to 0 (fully transparent), the masked object will also be fully transparent.