the ears mod allows custom ears that you apply by adding the pixel on your base skin png, much like just expressions resource pack. would be nice if i could have working eyes with my ears !

This doesn't seem very realistic to me, but the Ears mod uses a very interesting method of encoding additional data into a skin, I could see it being possible to do similar in order to tell the mod where the players eyes are located and have it use the pixels straight from the default skin area, thereby making most of the extra pixels that this mod uses obsolete and free to be taken up by the ears mod, but this would also require a major code overhaul and possibly an external program, like the ears mod has, to properly colour the encoding pixels.

Except this isn't a mod, it's a resource pack, so this isn't really possible to implement I don't think, my bad

oh that would indeed be quite a task ! thanks for the reply !!