The materials are mostly Poser's Physical Surface Root. That's pretty much standard, I guess.

Just try it for yourself. Make a Box with a small opening (use a closed room for example) and render with and without an ambient lit skydome, with an additional meshlight on the inside. Do a render, with Pixel Samples set to 2 or 3. Then remove the ambient from the skydome and try again.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.