I thought it would be cool to whitelist skulls so I can put them in the bookshelves, =/ but it turns out it was a REALLY bad idea on my part, rip that world.
crash-2018-03-18_13.06.22-client.txt

this one's DEFINITELY my fault but I thought that maybe this ...mess up may help someone else not repeat my mistakes at least

I assume you tried vanilla skulls? Seems they have a null particle texture which I assumed was illegal. I'll throw a catch for that for the next version.

yes! it was vanilla skulls that i tried.

Fixed to no longer crash in 0.1.4, it will just have a default color now.