Hey there, i know a lot of people that use tree fern panel. The thpught is to go with as natural as possible inside the vivarium (less silicone, greatstuff, ect). If you plant it heavily, and mount a bunch of plants on it you wont even see the hardscapes anyways. I personally do not use it but it is not uncommon. I was thinking about trying it out for one of my future vivariums. Just my 2 cents

-Kevin