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h2oStudios
12-10-2006, 01:11 PM
I'm using the BESM shader for an animation and have ran into a problem. I'm using transparent surfaces (a glass cup & water inside) which have BESM applied to them, but the LW Edges do not appear behind the transparent surfaces, nor am I receiving ray-traced shadows on the non transparent surface.

If anyone knows how to resolve this issue I would greatly appreciate the help.

Here's an attatched image the exemplify the situation.

h2o

meshpig
12-10-2006, 11:05 PM
Make sure you have raytracing on for both shadows and transparency. Should be no problem.

M

meshpig
12-10-2006, 11:10 PM
... you won't get an outline in the transparent area because it's an outline, if you get my drift.

39787

M

toby
12-11-2006, 12:35 AM
A neat trick to get outlines using geometry is to copy your geometry into a new layer, flip the polygons, smooth shift them out a little, color them black and paste them back into the original layer. Since the black polys are inside out, you'll only see them around the outside of the original geometry. This will show up in both raytraced and non-raytraced transparency.

meshpig
12-11-2006, 01:00 AM
... way cool overkill!

:thumbsup: M

toby
12-11-2006, 01:27 AM
I learned that, and half of everything else I know, here on the forum, of course! :rock:

h2oStudios
12-11-2006, 01:07 PM
Thanks for the feedback, I had both shadows and transparencies enabled. I've found a way to work around this issue. Rendering the water object first, saving the image, then rendering the cup seperately, saving the image and the alpha. Finally compositing them together using foreground alpha fader. The shadow issue is the same, rendering the table with a non-transparent cup (hidden from camera of course) and saving that as an image or sequence.

I'll post some images and maybe a clean step by step for those who may need this information.

@ toby - Sounds like an interesting solution.

Thanks for the feedback

h2o

toby
12-11-2006, 03:44 PM
I tried it too, and raytrace shadows did show up through transparency. It should work for you, unless maybe your transparency is 100%?

Compositing is always good though!