Verified answer

There is paint available that is the specific shade of green that works best with most cameras. However, if you have a good key system you can tweak the color pretty easily.

The most important thing is to make sure the color is complete even and flat all the way across the way. Patch it carefully and sand it to as smooth as you possibly can. Then use a really good primer - perhaps even two coats. Apply the final green paint with a very short nap roller so there's no texture. Two coats again would be best, and sand the wall thoroughly but lightly between coats.

As for under $100, this all depends on how big the wall is.

buy green paint....paint wall...it isnt terribly difficult. Go to your local Home Depot or sherwin williams or any store that sells paint and buy green paint. The key to the green screen is that it is a color that doesnt match any normal color found on the human body so that in an after effects program the background can be easily removed from a video. So just find a good bright neonish green color and paint away. I'd also recommend getting paint rollers and paint tarps and getting enough to give the wall several coats. Depending on how dirty or old your walls are you may need a couple coats of primer too. I hope this helps