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# 1 26-04-2009 , 05:40 AM
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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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# 2 26-04-2009 , 09:14 AM
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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?

# 3 26-04-2009 , 11:32 AM
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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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# 4 26-04-2009 , 12:49 PM
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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...

# 5 27-04-2009 , 01:03 AM
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will post when i get home




that's a "Ch" pronounced as a "K"

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# 6 29-04-2009 , 09:17 PM
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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 user added image

maybe i did something wrong with the rendering, the command line did throw a lot of warnings when it went to render stuff...




that's a "Ch" pronounced as a "K"

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# 7 29-04-2009 , 09:28 PM
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well here are some that i did after your posting user added image

the render layer were just a series of reflections

user added image

it didn't take long which is why they are not great

# 8 29-04-2009 , 09:40 PM
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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)


"No pressure, no diamonds" Thomas Carlyle

Last edited by gster123; 29-04-2009 at 09:43 PM.
# 9 29-04-2009 , 10:27 PM
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reflection gives the same results as refraction?
uh, i think you just lost me user added image




that's a "Ch" pronounced as a "K"

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