Can I use images from Subeta items in my overlays?

It says in the custom overlay rules "no unaltered official Subeta artwork" so does that just mean I have to alter it a little bit?

Thanks in advance!

Well, from what I know, generally it's like that: You can give your (for example) common kumos pet an overlay that is official common kumos art with markings or something added. You can give your common kumos pet an overlay that is angelic kumos' official pose with marking or something added. Buuut you cannot give your common kumos an overlay that is unchanged official angelic kumos pose.

Basically it's there to prevent making false claims about what your pet is, not that there is any point in bothering to do that imo xD