Ended up taking that detour from my studies to try out drawing some props and such (Since I realized I have never actually done it as a standalone thing)
Got a pitch from a friend who is writing a short story about a world where bones of large creatures and iron is plentiful but technology is scarce.
The people in the short story discover ancient alien weapons and armor that they then mix with what they have at hand.
I mashed out quite a few concepts, but this is some of the more interesting ones. The idea was that the green parts/metal signified the alien civilization, while the white bony bits and brown iron was tacked on in an attempt make the alien technology usable.
I tried to keep things lose, so not exactly great artistic results, but the entire thing was a blast to do.