Is It Possible To Allow Transparency On The Inner Layer With Resource Packs

[bigbadbuster7]

Ive been trying to find a resource pack that allows transparency on custom heads and ive even tried making one myself but none of my attempts have worked and i cant find any resource pack that can do it

[LordRazen]

As far as I know there's a way doing this with mods, but not by Vanilla Minecraft.

However, I dont know any details about this...