What approach for "smooth" 2D terrain that can be dug into / subtracted from

Thankyou, this helps clarify the complexity of this task and the search term that can help me create more optimized TileMapLayer colliders!

With this in mind, I’m considering learning to make a full game idea that mainly relies on TileMapLayer first, and then when this is done I have much more experience in coding, the step to making my marching squares terrain using custom rendering would be less daunting.

Then that would be my 2.0 version of the game.