Volumetric Light Problem 2003-11-24 - By Stan Slaughter
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Render in scanline, not raycast mode.
Stan Slaughter
http://www.stansight.com
-- --Original Message-- --
From: TSML [mailto:truespace@(protected)] On Behalf Of Dave Angelini
Sent: Monday, November 24, 2003 12:36 PM
To: truespace@(protected)
Subject: [TSML] Volumetric Light Problem
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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