Setting layers which impact on variety

[ChrisRegis]

Hi, @rounakbanik! I suppose it is the most user-friendly code to work with on this subject. Thanks a lot!
However, I have a challenge: I have 6 layers in total, and I want only 2 of them that program will treat as unique, and others wont.
I explain, there are layers, such as backgound (4 layers) that are needed just "for beauty" and 2 important layers. So I want program to work like this: when it is mixing layers and have combination like (XXXX XX) and (XXXX XY) - are distinct, but (XXXX XX) and (XXYX XX) as "the same" puctures and DO NOT create such picture. So the maximum number of combinations is less than multiplication of all layers by all treats.
Sorry, I am not so pro in coding)
Thanks in advance!

[ChrisRegis]

Well, sorry for disturbing! I have managed my issue. If someone is interested in my case, it is solving just in easy way: in 183 line of nft.py there is a method "drop_duplicates" and I added param "subset=['xxx']" to use only needed columns. After generating images it will delete undistinct.
Thank again for this tutorial! Good luck!