Projecting on black scrim

I've projected onto a black scrim many times, but don't know if I've ever "fun" projected on one. If you mean "front" projected, be aware that some of the light from the projector will pass thru and create an image on whatever is upstage of the scrim, which may or may not help.
 
I've mentioned this before but a nice and simple museum intro piece in Galena IL - a video of two actors portraying the Grants (as in Ulysses), small video projector, black scrim in an architectural arch, darkened room, a few set props behind carefully illuminated. Quite effective. They do regrettably refer to it as a hologram.
 
Black scrim is fun! Sucks up a lot of light, but what it does reflect gives you the impression it is a hologram as you don't actually see the scrim that is unlit. The problem is you have to worry about where the projection that passes through the scrim ends up because it will likely be visible as well. All in the angles.
 
We projected onto black scrim as a set piece on Il Trovatore -- you can see it top right in this pic:
http://packinghousegallery.org/wp-content/uploads/2016/10/SPO-IL-Trovatore-group-2-no-text.jpg
http://packinghousegallery.org/wp-content/uploads/2016/10/SPO-IL-Trovatore-group-2-no-text.jpg

It was a 3500lm Eiki, IIRC, about 15 or 20 ft DS of that scrim, flown from the grid, and driven by Qlab3 on my MacBook Pro. It worked out quite nicely, though the designer wasn't quite as careful with luminance on the first pass through the images; a couple of them, we had to tweak so they didn't drop out where he didn't want them to.
 
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A lot depends on what you are projecting. For some useful tips, see this Rosebrand article.
 

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