Hey there I'm commissioning a mod and we are planning to have an optional compatibility with this mod.

We are doing totally original animal pawn sprites and I'm kind of scratching my head trying to figure out what I should be directing my artist to produce for this compatibility.

If somebody could explain this a bit I would really appreciate it. I tried following the Google doc guide but I wasn't really sure what I was looking at all I gleaned from it is that the east facing sprite needs a white shaded mask and that would affect the rest of it maybe? Could really use some advice, thanks.