 | | | Volumetric Light Problem | Volumetric Light Problem 2003-11-24 - By Dave Angelini
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Howdy,
Still working on my CE3K scene and I have an issue with volumetric lights
and transparency maps. The trees in the scene are targe images with
transparency maps. All lights are set to transparent shadows so the lens
flares show up appropriately blocked by those parts of the targa image that
are not transparent and shine through the transparent sections.
The problem is that this is not the case for the volumetric lights. Here,
they are obscured by the plane that has the tree targa image mapped to it.
This can be scene in the following image:
http://home.comcast.net/~dianeangelini/Stills/ufo_bad_render.jpg
Note the volumetric light on the right. See how it is obscured by the
plane. I have tried it with ray-tracing as well as ray-scan. The tree
plane has had shadow casting enabled as well as dis-abled. It has been both
single and double sided. The only option that I have yet to try to allow
the plane to receive shadows, but I don't see how that would affect the
volumetric lights. There is another plane 90 degrees to the plane holding
the tree image that uses a shader to render it invisible, but it holds just
the tree mask (with appropriate transparent mask) and is used to cast a
correct shadow for the tree. That "shadow" plane also has shadow casting
enabled.
So how do you get volumetric lights to transmit through transparent planes?
Any help would be appreciated.
Thanks,
Dave Angelini
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