I got 2 tilemaps. One is solid (tilemap), another one is unsolid (tilemap2).
When a bullet is collided with a tilemap, I am trying to do the following
1) The solid tile of tilemap which we hit is erased
2) and is replaced with a tile of unsolid tilemap2 ( I used "set a tile" trick, not sure if it is right).
It drives me mad for over two weeks. I cannot achieve any of these effects while a tilemap is being hit with a bullet.