How to achieve something similar to having different collision shapes with "different collision masks" for the same character body?

Godot Version

4.3 stable

Question

What I need is for the player to interact with both tilemaps and fog, but these collisions cannot be in the same collision shape, since the one that should interact with the tilemap is, in some cases, below the player (because I’m trying to implement a 2d z index system), and the one that should interact with the fog would be stuck to the player. Does anyone know how I can do this?

Just add more bodies to the player. Areas are usually great for this. If you need Physics that could be a little more tricky maybe static bodies could do this. But if you only need to change the state of something after a collision, areas are what you want.