Shadow transperancy problems 2004-04-09 - By Simon Windmill
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Like Tom says, you have to use raytracing to get correct shadows out of
a transparency-mapped object in most rendering systems, and the usual
alternative for soft shadows is to use an array of lights or an area
light.
I did a quick test in VirtuaLight, using a tS goniometric light which
virtuaout converts to a spherical area light:
http://www.coolpowers.com/lab/data/transmap_vlight.jpg
You can set how many samples to use for the shadowing - more = better =
longer render times, as always. This one used 16 samples and took about
47 seconds.
Just for comparison, the tS version:
http://www.coolpowers.com/lab/data/transmap_ts.jpg
I couldn't actually get tS to render with its own area light in tS5.1 -
does it have to be done in a radiosity calculation?
PS - John, I know you were having trouble with transparency maps and
virtuaout, did you get it sorted?
Simon.
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