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White line around object (shadow catcher)

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Diogo Salvador
White line around object (shadow catcher)
on Sep 11, 2018 at 6:12:21 pm

Hello,

Im using R19 with the shader shadow catcher (physical render) but my render shows a line around the edges. Any option i can activate to remove this line without going in post-production?

Thanks in Advance


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Steve Bentley
Re: White line around object (shadow catcher)
on Sep 12, 2018 at 2:13:03 pm

Depending on your alpha (straight or premult) that edge may or may not show in your picture viewer inside C4D, but may not show in your final comp.
Straight alphas have to generate stuff outside the matte (and that may be what you are seeing) so that the alpha can cut the image off clean and you don't get what amounts to a double matte line - one from the content edge and one from the alpha edge. This extra stuff won't show in the final comp as the alpha cuts it off.

What format of file are you rendering to? What depth?

What color is the object you are using as a catcher? Are you using the built in catcher? or the after market one that we used to use before C4D realized we needed one built in? (R17 I think).



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