 | | | Volumic shadows problem | Volumic shadows problem 2005-01-04 - By Morten Bartholdy
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Has anyone here found a way to make volumic shadows respect shadows rays turned
off for specific objects?
To keep things simple and rendertimes low I need to use shadowmaps instead of
raytraced. I have transparent objects in the shot, so to get proper shadows
from these I need volumic shadows. I have other objects I don't want to cast
shadows, so I have turned shadow rays visibility off for those. Problem is,
normal shadowmaps respect that, but don't become lighter through
semitransparent objects, which volumic shadows do. Volumic shadows however don
't respect when shadow rays are turned off, so it is a sort of catch 22. I wan't
to avoid passes on this one as it would becom fairly complex.
So I thought someone here may have a nifty way of making volumic shadows see
shadow rays are turned off!?
--
Morten Bartholdy | morten@(protected)
Denmark
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<DIV><FONT face=Arial size=2>Has anyone here found a way to make volumic
shadows
respect shadows rays turned off for specific objects?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>To keep things simple and rendertimes low I need
to
use shadowmaps instead of raytraced. I have transparent objects in the
shot, so to get proper shadows from these I need volumic shadows. I have other
objects I don't want to cast shadows, so I have turned shadow rays visibility
off for those. Problem is, normal shadowmaps respect that, but don't become
lighter through semitransparent objects, which volumic shadows do. Volumic
shadows however don't respect when shadow rays are turned off, so it is a sort
of catch 22. I wan't to avoid passes on this one as it would becom fairly
complex.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So I thought someone here may have a nifty way of
making volumic shadows see shadow rays are turned off!?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>--</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Morten Bartholdy | <A
href="mailto:morten@(protected)">morten@(protected)</A><BR>Denmark<
/FONT></DIV></BODY></HTML>
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