The texture of the block "Netherrack" is BLACK, when it is in the cave of the "nether", and places a torch, does not illuminate anything, as it has no texture or is buggy.
Using:
Unity: Base - 2.4.0
Unity: Extras - 1.1.0
Unity: Modded - 1.3.0
Unity: Dark Edition - 0.7.0
The image below shows the block placed and in my hand.
