You really need just very few things to make a simple photobox, which will improve an photos made of miniatures a lot!
I just got an piece of an old board and 2 wooden straps from your homecenter of convinience. In addition, some black paper and a piece of white semi-transparent curtain. Plus a super-glue and a glue for wood...
1. Cut 4 pieces from the strip with the same length: They will be your poles for the framing. And then 2 pairs with the same length for the ceiling...
And that is it: ready to go!