Ok tried the Tilemaps Shadow Caster in the second link. Could not get it to work with the generated shared walls tilemap layer. Or it actually generated shadow casters but they didn't show up. I did have to do this in play mode, so not sure if that's the problem
It does kind of work if you put it on each of the wall object inside a room template, but the same problem as before occurs when intersecting with corridors. The auto generated shadows are also not perfect.
So I’ve done a fair bit of research and it seems like the main problem is with shadows in enclosed areas (which the dungeon is). You can see a discussion here: https://forum.unity.com/threads/script-for-generating-shadowcaster2ds-for-tilemaps.906767/#post-7220347 . And as far as I know, these people do not have a working solution for this. However, someone from Unity replied there that in Unity 2021.2 it should be possible to access collider shape primitives and that it may be easier to fix these problems. I also tried working on my own solution but it’d require quite a lot of polishing and would also probably become obsolete soon as 2021.2 is already in its beta stage. So I’d probably recommend waiting for the new version of Unity where it should be easier to automatically generate the shadow caster shapes.
