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avi texture with alpha channel problem
I am trying to insert live action video shot with a green screen into a C4D scene. I have used After Effects to create an AVI file with embedded alpha channel. I then create a plane object in the sceene and create a material assigned to the object and then use the AVI as the texture in the alpha channel box. However I find the resulting video is semi-transparent. Does C4D not recognised AVI texture files that have embedded alpha channels? If so is there an alternative method I could employ to insert live video of actors into a scene?
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7 Replies
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I’d suggest exporting to an image sequence instead- like Photoshop sequence from AfterEffects. You should have much cleaner results than AVI which depending on the codec has a not great alpha channel.
Noah
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Thanks for the response, I did think about the approach you suggest but I can’t see how to get the Material dialogue box to let me load an image sequence instead of an AVI. Do you know if this possible?
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Sure- you load the first frame as if it were a still, then click on the animation tab, then click calculate. The rest of the frames will be loaded.
Noah
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I’ve just followed the procedure you outlined but when I click calculate it reports just 1 in all the boxes. I’ve tried several variations to get it to ‘see’ all the frames in the file but without success. I’m using Ver.8.5 – would this make any difference?
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You are loading in the still from a directory in which all of the rest of the stills in the sequence are there and following the same naming scheme?
Noah
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Just tried it. Works fine for me- but then again I’m in 9.5 so that might be an issue. Don’t forget the it will not update in the preview window, only on renders.
Noah
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Noah,
yes I’ve output the original video file as a numbered sequence of TIFF images from my editing program, all into the same folder. The format is alpha characters space numbers e.g. FRED_123
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