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Old 26-04-2009, 05:40 AM   #1
Chirone
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Default render layers refraction

...you'd think i'd have render layers mastered by now...

but anyway, i have a transparent bubble and when i use render layers the stuff behind it doesn't show up in the diffuse pass, and i have a refraction pass which shows all the refractions and everything behind the objects with transparency

so the question is, if i have a layer with all the refractions and the alpha channel covers everything then how do i composite it onto the diffuse?
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Old 26-04-2009, 09:14 AM   #2
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i don't really know what you mean by refraction pass tbh, but you could switch the alpha channel with which ever one you want. just do a quick ID pass.

what are you using to composite?
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Old 26-04-2009, 11:32 AM   #3
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by refraction pass i mean a layer that just has what you get from the refractions on it

(it seems necessary since the diffuse pass just rendered the transparent object as white which i suppose is what we'd expect?)

i was trying it with photoshop first, but it's an image sequence so i'd be compositing it in AE or FCP
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Old 26-04-2009, 12:49 PM   #4
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hey man, post up a screenshot.
I'm not sure you need a refractions pass. you could just add it into your beauty pass. you could maybe just do a reflections and a specular and a beauty.

i've never made a bubble tho...
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Old 27-04-2009, 01:03 AM   #5
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will post when i get home
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Old 29-04-2009, 09:17 PM   #6
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eeh, i don't think there's any point in posting the images

well.... one i'm too lazy,
and two, none of the passes have an alpha channels other than the master beauty

maybe i did something wrong with the rendering, the command line did throw a lot of warnings when it went to render stuff...
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Old 29-04-2009, 09:28 PM   #7
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well here are some that i did after your posting

the render layer were just a series of reflections



it didn't take long which is why they are not great
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Old 29-04-2009, 09:40 PM   #8
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I'm confused on it too tbh. A reflection pass on every surface should get the same results (or as least as far as every render I've done it does)
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Old 29-04-2009, 10:27 PM   #9
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reflection gives the same results as refraction?
uh, i think you just lost me
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