This mod replaces the lame 2D bullet casings with actual 3D models, because it's 2018 and I'm sure your CPU can handle it. Enough text, have some fancy gifs:
FAQ
Q: Why is (insert gun) using the wrong caliber?
A: Pretty much every gun uses a 5.56 or a 9mm casing, which I can't fix unless someone wants to go through and correct the effects for each gun (then make the necessary assets for each one).
Q: Can you make the casings last forever?
A: I tried. The game stops spawning them at some point.
Q: Will this impact performance?
A: Probably. On my bad laptop I dropped 20 frames more than usual.