I have a 2x4 frame that was previously used as a cliff (chicken wire and wood floor underlay paper for that one, wrinkled, spray painted, etc.). 

I need to use the same frame to construct a coral reef, but the only thing I can think of to texture it "bumpy" is drywall texture.  It might be too heavy for the paper, though, as the frame is 8' tall and 6' wide. 

I can construct different types of coral and spray them with drywall texture and attach them to the main reef.  Not sure how that would work either.

Does anyone out there have a better idea for making the bumps representing the coral?

Thanks!