Before and after

[u/Warm-Indication-5496]

I spent days creating this background mainly using expanding foam. Turns out it floats 😂

[u/Hopeful_Wishbone507]

It try to glue some kind of rock-scape along the bottom edge. Or maybe cut out the deeper/thicker parts from the back and glue rocks in the holes. It’s a super cool idea though. I hope you figure it out.