I've filmed a glass of water with liquid being poured into it on a green screen. I know its not going to be perfect but when I key it I lose the sides of my glass. Any advice on the best way to key this? A tutorial on how to matte something like this would be great too. Thanks
The former 'Ultra Keyer' by Serious Magic touted being able to do just this, and even with water in the glass. That technology is what is built into Premiere CS5 and up as 'Ultra Key'. If you own it, you might want to give it a shot.
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You're not doing yourself any favors by shooting on such a wrinkly green screen. It's not a uniform green, and any chroma keyer is going to see the wrinkles as being a range of colors, and not different luminance value of the same color...and the edges of that glass are probably falling right in the range of your wrinkles.
Your results will be 1) easier to achieve and 2) better-looking by using a featureless green background for the shot. It's simple logic: you give yourself the best shot at a good effect by fixing any and all problems before shooting.
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