Here's a "behind the scenes" look at how yesterday's photo was taken. It's a pretty simple one. Slats from a wood pallet make the floor. A piece of 3/4" plywood from a crate makes up the wall with a crack (I think the crate I got the plywood from was hit by a forklift or something, because breaking 3/4" plywood is hard).
The light for the scene comes from a cheap little $8 LED light panel, you can see it on the right side. It's mounted on a bendy goose-neck. You can also see my red tripod in the front left corner. A very simple setup.