All RoC flakes and intermediaries for nether ores have missing textures, and appear as blank boxes with purple corners in the top left and bottom right.

In addition, the same thing is true of all the nether variants of the ingots and dusts.

tested on commit 66a7188

Picture:

That's what I was telling you @Yulife! 😛

Maybe I'll do Nether ores. Not sure. Some ore types are dead, e.g. Force (Dartcraft) and other stuff. I'm not wasting my time on those :P

It's hard to tell which ores do or don't need to be done. You could just duplicate ones with similar colors and change hue/add more noise.

Of I'll include reikas by default

We will revisit Rotarycraft if it ever updates to 1.12.