Texture map for magma cube (magmacube.png) has unused pixels

The magma cube UV map has random sections that are not used in the model at all.

The images attatched show:
1. The unused art selected, and colored
2. The unused art selected
3. The default UV map currently used

The top right bit seems to be left over from the devs presumably copying the slime texture (which has 3D eyes) over to use as the magma cube, along with unused bits of lava, and a bit of a mess in the rop left area.