It may very well be a spontaneous mutation, that's what I meant when I said assuming it was reproducible genetically, and I kind of knew as I was typing that that I probably didn't word it right.
No, the parents are not related at all, to my knowledge anyway. Got from different people at different times.
If it is spontaneous mutation, well, guess I can not reproduce the effect. But I still am happy to have a really cool snake. But you never know, so let's see.