I encountered a very strange grid physics problem.

[perfectsummer]

When I use my own model mesh and enable physical collisions, my controller will malfunction and crash.

2025-08-31 00-42-29.mkv

[silent]

perfectsummer

The issue is probably related to the scaled being applied to the floor mesh:

You need to reimport it and adjust scale on import stage (it should be 1, 1, 1 or physics will not work correctly).

Thanks!