View Full Version : Volumetric error or bug?

10-02-2003, 01:35 PM
Can anyone tell me why the volumetric light bleeds a curved line?...actually why is it on then off...It shouldnt be there at all, I cant tell what is causing it?

Volumetric Error (http://www.3dink.com/verror.mov)


see the curved line? that shouldnt be there at all!
and for some reason, above the curve is filled in, then flashes off!
does this have something to do with the attenuation?
the camera is not outside of the light...its not passing through any columns of light...its as if some sort of incidence angle effect is happening as the camera moves...

I have one large volumetric light pointing down through a ceiling object with holes in it...so I am using just one light instead of many to speed up rendering.
I am using shadow mapped spotlights, although raytraced creates the same problem, only takes longer to render!


10-03-2003, 02:32 AM
Just an idea, are you using motion blur and DOF? Because of the way these items are calculated, you need a lot of passes to smooth things out. Have you tried the same scene on extreme anti-aliasing?


10-03-2003, 06:57 AM
so...the LAME solution is that I had to use "-1" for Shadow Fuzziness for the shadow map! luckily Im the kind of LW user that pushes everything and uses strange #s between negative infinity to infinity....and beyond!

but why?! why cant things just work right?

gotta love LW sometimes...

thanks for your help though!

10-03-2003, 11:59 AM
Push that sukka howie push it!

Life on the bleeding edge of lightwave can be painful I know.
I always enjoy watching you work through these problems.
Be sure and let us see the final result when your done.