While debugging KGlobalAnimParser.ParseAnimData for a mod, I realised the data for painting_wide_kanim seems a little odd.
The KAnim.Anim.Frame says it has 5 elements (other paintings only got 4). Looking into the frame elements it seems there is a duplicate element. The 3rd and 4th frame element both has the same symbol (e.g. "art_3x2_a"), transform, etc. (the others are frame, stretch marks and backing).
I guess that was an error in data export? It doesn't really lead to any problems ingame as it's just the same sprite being used twice on top of each other.
1. Attach a debugger to the vanilla game 2. Put a breakpoint into KGlobalAnimParser.ParseAnimData (condition animFile.hashName.HashValue==1837992267) 3. Step through the parse process for art_3x2_a (or _b to _f)