The rug is a vector that I downloaded and was using as a placeholder. I was going to design my own pattern after making sure everything looked nice. I used the distort tool in Clip Studio Paint. I don't know what the equivalent is in photoshop or procreate.
As for the bio-luminescent effect, I just used regular soft round and hard round brushes in Clip Studio Paint. No layer effects or anything. The colors are what make it appear bio-luminescent!
Thanks for your kind words!