A few years ago I bought a set of three Hotline Miami posters from the Eurogamer Expo. As much as I liked them I never round to hanging them - I kept telling myself I'd get a good frame, but never did.
This frame was made from a single piece of oak, and consists of dovetail-like joints in for the middle of the structure with half-lap miters for the corners.
The glass was upcycled from 3 individual picture frames from the local scrapyard - The existing frames were completely mismatched and in a bad state, but they all happened to have the same size glass, which cleaned up easily for this new frame.
Pic of the finished frame below, with sketch/build video below.