Integrity
10-22-2004, 08:53 PM
I don't know if it means anything to anyone but I was playing around with Lightwave and I noticed that spotlights when on shadow mapped shadows does not take any transparency into account when rendering. I don't know if anyone else has noticed it, but if you have and know I am missing something please do tell so.
I basically just set up a simple polygon as a plane, and another two-segmented flat square blocking part of a spotlight from hitting the plane. One segment of the blocking square has 50% transparency while the other has none. When the spotlight is set to Ray Trace shadows all goes well; halve of the shadow is grayish due to transparency and the other halve is fully black (light's shadow color is set to black). But when I switch on Shadow Map the shadow is fully black. I usually use Area Lights (I tested area lights and they don't have this problem) but I might use Spotlights in the near future due to rendering times and I was wondering if there is a way around this and if not I just wanted to let people know (unless everyone already knew, sorry about that).
Thank you.
I basically just set up a simple polygon as a plane, and another two-segmented flat square blocking part of a spotlight from hitting the plane. One segment of the blocking square has 50% transparency while the other has none. When the spotlight is set to Ray Trace shadows all goes well; halve of the shadow is grayish due to transparency and the other halve is fully black (light's shadow color is set to black). But when I switch on Shadow Map the shadow is fully black. I usually use Area Lights (I tested area lights and they don't have this problem) but I might use Spotlights in the near future due to rendering times and I was wondering if there is a way around this and if not I just wanted to let people know (unless everyone already knew, sorry about that).
Thank you.