Well - there are no rules for the usage of my photos ;-) Do whatever you want, use them for private or commercial works, I don't care.
If you want you can leave me a message when you use one of them so I can have a look at the result and if it pleases me I'll fav it :-)
Happy manipulating! ;-)
My main account: ~Abalone (https://www.deviantart.com/abalone)