Crossposting from here as I should have done a while ago:
AlexModGuy/Ice_and_Fire#151

Basically having AE2 installed alongside Ice&Fire breaks most of the textures from I&F in the inventory. The dev believes it to be caused by the default item renderer being changed by you.

MC 1.10.2
Forge 12.18.3.2254
AE2 rv4-alpha-11