 | | | Volumetric Light Problem | Volumetric Light Problem 2003-11-24 - By Spencer Britton
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Dave, I think it is time to composite the image you are trying to achieve.
Sorry I don't have a fix for the transparency/lighting problem.
Spencer
> 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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