Haven’t had much time to research this. What I do know is that diffusion is key, and not just using semi-transparent film like I was doing.
A spherical diffusion seems to be very popular (Blackmagic mentions using it in the Cintel) and effective. I have not built any thing to test it, however.
Here’s some info on spherical diffusion:
I would love to see someone build a small lightbox test! Come on…you know you want to!
Seems like we could use something like this?