Ssoo...thank you, DT!
It's made from a photo, taken by me during a cave tour (I'll create an article about it soon). I'm not a PS master, but I use some effects on it - mostly accidentally :) - and it seems the result can be accepted by Admins. If it will sell well, I'll upload some more, but let test it first...cheer for me :)
Optional question: how do You create illustrations?
PS: Yesterday I've made my 100th sale on DT...with an other cave photo! :D
Thank you, dear Buyers!