gaps btw shadow and color passes

[Aruna]

What does your color pass and shadow pass look like?

[skeldance]

what do you mean by that "What does your color pass and shadow pass look like?"

sorry I didn't quite understand...

[Aruna]

What do the images look like? Can you post a frame of the two sequences side by side? I'm interested to see what the images look like before I give you any information, since my information may not work with the way you rendered your images!

[skeldance]

here's couple of images.
looks like some pixels of shadow pass are taken.
is it because of alpha?...:thumbsdow

thank you..

[Aruna]

It's most likely because of the alpha, but those two images don't really tell me what layers you are using when you composite.

If you are using a shadow layer (pass) and a color layer (pass), depending on how you rendered out your shadow pass, you shouldn't have the gaps in between objects.

Is your shadow pass black and white, or did you just turn on shadows and render it that way?

What sort of layers/passes are you using? If you can show each layer, that'd be more helpful.

[Aruna]

Another thing you might try is to turn pre-multiplied to off when you render your shadow pass. The anti-aliasing in Maya sometimes screws with shadow pass renders.

[skeldance]

ok...I didn't use render layer and just turn on color and shadow passes in the render layer/pass control option under render global. and shadow pass contains alpha so you don't see anything unless you turn on alpha channel. I think you already know about that..
I don't know if this is gonna help but..I'm attaching a shadow pass which is showing its alpha
please tell me if there's other way to get around this problem..

thank you

[Aruna]

How are you adding this shadow pass to the color pass? Are you doing a screen or multiply? I'm not that familiar with AE, so can't help you on the technical side of that package, but I would check several things.. The first being how you are rendering your shadow pass.. Don't render it with premultiplying, and see if that helps. Second, find an AE guru and see if they can point you the correct way of layering the shadow pass over your regular pass (using a multiply, screen, etc).

I hope that helps! Sorry if I couldn't give you a bit more...

[skeldance]

well, I've already tried different ways but didn't work..and as far as I know maya renders image as 'premultiplied'. can't get out of that.....
anyway thanks for the help. I should be able to find solution, eventually...=)..I hope so...

thanks again

[beaker]

check the "composite" box in the renderglobals to turn off premultiplication.

[skeldance]

could you explain me what composite thread do?..
I rendered with checking it on but still AE takes as premultipied..

Thank you

[beaker]

Originally posted by skeldance
could you explain me what composite thread do?..
I rendered with checking it on but still AE takes as premultipied..

Thank you
AE doesn't automatically read stuff in as premult, it asks you what you want to import it in as(premult, or unpremult) when you bring the file in.

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