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Displacement map problems
Ive rendered out a black and white alpha pass of a 3D mesh outof Cinema 4D. The pass is a object buffer which is just a basic black and white alpha channel pass.
I want that alpha pass to displace the footage I have below it. I have everything set up and its displacing the footage, however im having trouble with the sides, top and bottom of the footage. No matter what settings I use, the main footage is moved by the displacement map causing the sides to be black. Its almost as if ive moved the footage over out of the view.
I have a basic understand of how displacement maps work, but I am not sure how to correct this problem. I know that 50% gray will not displace, but the alpha pass I have is solid black, with white and gray areas.
Any idea?
Thanks
Shane -
4 Replies
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I’m not sure if your alpha has any greys in it, but displacemnt maps needs shades of grey to look good.
black will displace 0%
white will displace 100%
the greys inbetween smooth out the displacement. -
Ok, then I guess ill have to do this in 2 parts.
The first part will have the black/white alpha, because I need that for the track matte.
The second part, ill have to replace the black with 50% gray, and use that for the displacement.
Or better yet, is there a way to add displacement to areas that only show by the track matte?
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Hey! That worked! Thanks!
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nope, not sure at all…
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