That was really helpful tiamat.
The foam is "great stuff" or "touch n foam pond" Greatstuff is usually yellow and touchn foam is black if you get the right one.
It is usually covered with silicone and coco fiber to look like dirt or tree...
or a cement type mixture to make it look like rock.
If you're lucky, you can shape it as you spray, but most shaping is done by carving it with a serrated knife after it's dry.
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