Anti-Aliasing after Sky Replacement

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Old 04 April 2017   #1
Anti-Aliasing after Sky Replacement

Could anyone educate me on why I'm getting this thin white anti-aliasing line on my foreground image after replacing my sky? I'm working in Maya and rendered out the scene before bringing into photoshop. I found a background image I wanted to use but keep getting this thin white aliasing.

What would you recommend I do to correct it. I haven't gotten to color correcting the new sky/backplate because of the issue I'm having. I'd like to correct "it" before tweaking this image.

Any suggestions offered are greatly appreciated.

Thanks!!
After Sky Replacement



Signed,
CG Rookie.
 
Old 04 April 2017   #2
I don't know for Maya and am probably behind on some other stuff, but...

I guess you rendered against a white background so the roof line and the background blended together at the edge.

If you can save an image with the background as an alpha I think you want to make sure "premultiplied" is off (but I haven't gotten around to actually researching that).

With the render on a different layer than the background, you can remove fringe. I think it's at the bottom of the the layer menu.

Hopefully somebody better will chime in.
 
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