You'll notice the fuzzy remanants of the green screen after using Ultra Key filter.
How do I get rid of this? Any help is much appreciated
easy fix, more lighting it helps to have a clean constant shade of green. its harder to key out the bottom because the green has more shaddows. add some more light at the bottom, and try to remove some of the wrinkles and folds too.
There's plenty of great tutorials online for achieving better green screen results, but the big thing is to get a few feet of separation between green screen and subject, and light background and subject individually. You want a nice even wash of light on the green background, and then light your subject decent and that's half the battle. The space between background and subject does a couple of things - eliminates shadow against screen, and minimizes green light bouncing onto subject from background.
Don't be afraid to move other sliders like Tolerance to tweak the key, and where it says "Output > Composite", you can change that to Alpha it shows the key as black and white so you can really adjust for a clean key edge and then switch back to Composite view.
Safe Harbor Computers
...it's also worth putting a magenta (for green screen) kicker light behind the subject towards the camera. This gives a complementary colour rim light which makes it easier to create a key around the hairline.
Thanks for this test image - as you said - one click perfection
Thanks for the suggestion
Please tell me more about "magenta (for green screen) kicker light" - the lighting kit I have is: http://www.ebay.com/itm/160851228242?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht _9262wt_1271 - If I need more, do you have any suggestions?
I've noticed it is very challenging trying to illuminate my entire screen (including bottom) - any tips are very helpful.
I would also recommend trying to split the clip into two seperate pieces - top and bottom. The color on the top is extremely different from the color on the bottom - don't try to key both using the same effect.
Duplicate your clip, use a garbage matte to key just the top in one copy, then use a garbage matte to key just the bottom.
There is a very indepth tutorial on getting good chroma keying on Video2Brain.
I use a very diffused Lowel Prolite/barn doors with magenta colour on the floor at the base of the green screen facing towards camera. I often suppliment this (depending upon subject) with a Lowel Prolite as a rim light at the top of the greenscreen facing forwards. This does show on the top of the head and some clients don't like it.
With your 3 soft boxes, I'd use two on the backdrop at 45 degrees from it on each side. When you think you have lit it, pan the camera left to right and take aperture readings. You know it's evenly lit when the aperture remains the same at both the right and left side of the green screen.
Sit your subject at least five feet in front and place the third soft box at about 7 o'clock or 5 o'clock and slightly higher than the subject, pointing down to light the subject slightly from the side and above. An egg crate on the subject soft box will eliminate spill.
Wow - thanks for such great and detailed instructions