That boa cage is nice looking.

NEHERP has some good instructions for using cork bark to create backgrounds that are not just flat:
https://www.neherpetoculture.com/custombackgrounds2

Josh's frogs has big sheets of cork:

https://smile.amazon.com/gp/product/B08V262JX5/ref=ox_sc_act_title_1?smid=A2DW5FJX4FAVYN&th=1