I made an ability for my game that allows players to walk through walls, and I went all-out with the visual effects for being inside something.
https://i.gyazo.com/48b25cb832cfedbfa98dc6ca51e5d983.mp4
It’s still a little buggy, but I’m very happy with the results so far.
EDIT: It was a bit hard to see so I made the backface slightly transparent + adjusted the particles.
