Hi. I am having a problem with chroma key. Let's say I am standing in front of a green screen and a little bit of my shirt is green. When ever I put on chroma key, a bit of my shirt is transparent. How do I prevent that? I am using Vegas Pro 17.
Wear a different shirt, either white or on the opposite side of the chroma spectrum.
Hint: Flesh is an opposite hue of a studio green screen.
The only way to prevent is not to use the background color for the foreground objects, not even for a small part of the foreground object. That's a total no-go and rule #1 for keying.
The only other way to do what you need is either a $1000+ tool like Mocha from Boris or...
Mask every frame yourself.
The latter will probably make you want to kill yourself well before you're done with the video.
Use a green/blue screen with the recommendations given above and do a youtube search on green screen tips.