I mainly just don't want to have a dedicated lamp for it. Its easy to try though since pothos is cheap. I don't want to take up a lot of room with a full 3d background but I think I will make one that takes up the top 5 inches or so. That will give me a spot to put plants and be able to carve out some intersting depth. What would you guys use for that? Corkbark maybe?
Like my pothos idea, I haven't tried this but was inspired by PlantedRich's planting in a log. Why not pile in some wood and tuck some coir into crevices as planting cups? I can see it looking like a fallen trees forest on three sides, with greenery jutting out of the tangle of fallen wood.
Obvious issues would be cleaning, that much wood in a tank will tannin the water strongly, and wood does grow bacteria and deteriorate. You would need to have shrimp and otos as a cleaning crew for all of that wood. Hollow wood would be necessary for the big pieces so you don't displace too much water.
Fake wood like the stuff used in turtle tanks could be used. Placing it at different angles up the walls of the tank could be interesting. But that could be expensive. But I do like the look in my mind.