I don’t have a very pressing question but a solution to this problem is very welcomed.
I want to turn one layer from a given tilemap into a real static collision when running the game. So the tilemap layer would be the grounds, the walls…
Yes, it looks like you just need a built-in tilemap collisions:
You have a Collision group and image for a Tilesource (you can use the same image here as above, so the collisions will match what you see in the tilesource):
When you do so, you can select the collision group (“ground”) abd select on the tilesource which tiles should be taken into account as “ground”:
And then you create your tilemap and when you use it in a collection add a Collision Object with group: “ground”, proper masks groups (like “hero”, “player”, “enemy” or so) and as a collision shape use the tilemap: