I am running many mods, but by removing some or others, I believe the problem is Academy craft, as with only that and lambdalib (core mod) I have the error. The textures of some items are white or gray squares that flicker. The same things happens with some blocks when held in hand, but they look normal when placed.
The problem occurs equally with modded and vanilla items. Also, the affected items change whenever minecraft is reloaded. Any fixes besides removing AcademyCraft? It's kind of the centerpiece for the mod pack, so I don't want to get rid of it.
I have attached a screenshot to give an idea of what the textures look like.
Actually, I don't believe the problem is academycraft, or any other mod. I loaded forge with no mods, and the textures were still bugged. However, changing forge to a different 1.7.10 version does not fix this. The problem does not happen without forge.