help - problem

Problem

And a screen with a background in 2D and a plane which is above the
CHARACTERS, but on the “map” that he’s explosions have
the ground which I need to open a hole
the image as follows

365605--12694--$_g_249.jpg

¿Qué?

Just to clarify, do you mean you want the explosions to make holes in the terrain that the characters can then walk into, etc?

yes exactly, and continuing with the collision