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View Full Version : when i check refraction i lose cast shadows..why?

yolao
04-22-2006, 06:30 PM
Hi

When i check refraction on a transparent surface i lose the cast shadows of it..

I made this example to show what i mean.

I have two spheres, one is a little bit more big than the other and is transparent, i render
with HDRI, FG and GI...no refraction on the bigger sphere
http://i45.photobucket.com/albums/f86/yolao/3d%20images/sphere_noRefraction.jpg

then i check refraction with this settings
http://i45.photobucket.com/albums/f86/yolao/3d%20images/checking_Refraction.jpg

and i hit render...note that the cast shadows are gone
http://i45.photobucket.com/albums/f86/yolao/3d%20images/sphere_with_Refraction.jpg

what can i do?

thanks
Jozvex
04-23-2006, 12:32 AM
Maybe your raytrace shadow depth is too low on the light or in the Render Settings? Are you using raytraced shadows?
yolao
04-23-2006, 02:22 AM
Maybe your raytrace shadow depth is too low on the light or in the Render Settings? Are you using raytraced shadows?

Thanks a lot for answer..

Yes i`m using a point light with ray trace shadows on...and i`m using MR with GI and FG with an HDRI map. I`m living the default settings for the GI and FG with the exception that i turn to 8 the filter in the FG.
i increase the ray depht limit on the raytrace shadows attributes of the P. light from 1 to 2, and now i have cast shadows, the problem is that i have a light in the outline surface of the sphere
http://i45.photobucket.com/albums/f86/yolao/3d%20images/sphere_MR_render.jpg

what can i do to avoid this light in the outline of the sphere?


thanks again.

best regards
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