DIY retroreflectove chroma key screen question

Sounds like not a bad idea. Paint the wall middle gray and then top coat with this stuff. Worth trying with a small piece of foam core or something. But at $25 a can (after a quick search, may be cheaper if you look harder) it seems like that would get expensive for larger projects. Could be useful if you needed to key out something small on a set however.
 
$25 a can is about right, so an 8x8 wall surface would not be cheap. maybe 200 to 300 dollars, but fabric versions commercially available run over a $1000. before going out to buy a can I was hoping to find someone that had used the paint to make a chroma key screen.
 
1000 dollars! The best foam backed green screen material you can get is about $113.00 in an 8x10 foot size from a reputable US company. You'll probably want 8x16 or 8x20 that will allow you to cover some floor area (standing subjects, etc.).
Most companies that sell this material have custom sizes for not all that much more money. If you use it with a BG stand and crosspole rig, you can clamp your backlight(s) to the cross bar.
Some small studios actually staple it to the wall and let the extra 8-12 feet at the bottom form a natural cove onto the floor.
Very versatile stuff.
Hope this helps.
Ken
 
The only time i could see this being really critical is if you needed to shoot keyed footage on location with not a lot of time. You could easily set up a retro-reflective cloth background and not need to do much lighting other than a small LED on camera. That being said if you have the time and space you will be cheaper getting a green cloth and lighting it separately.

In my studio space we just painted a wall and floor green. Not a full cyc yet but its effective enough for now. Better than the fabric we used in the past.
 
treynolds said:
The only time i could see this being really critical is if you needed to shoot keyed footage on location with not a lot of time. You could easily set up a retro-reflective cloth background and not need to do much lighting other than a small LED on camera. That being said if you have the time and space you will be cheaper getting a green cloth and lighting it separately.

In my studio space we just painted a wall and floor green. Not a full cyc yet but its effective enough for now. Better than the fabric we used in the past.
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as you said have the space. I will be working in a small space so the lighting of the screen is a big issue. a bunch of stuff has cropped up keeping me from experimenting with the spray paint I mentioned, but when I do get around to it I will post the results.
 
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