Some of the more noteworthy block texture changes
Some item textures
A sample of the moody Nether
Version 3.1.1 includes textures for Nether Ores and Biomes o' Plenty's Overgrown Netherrack, among others.
Various Nether ores from Metallurgy 4, Nether Ores, and others, augmented by Better Foliage
v3.1.8 using multiple mods that add ores to the Nether
