Sean
I'm not involved in development of ProjectRed or VanillaFix, but test it against this release of ProjectRed: http://chickenbones.net/maven/mrtjp/ProjectRed/1.12.2-4.9.2.110/ This is the latest version of the mod, it is just not...
The mistexture on the blocks I believe is a Flan’s Mod issue, I read about it earlier. The black lines, which is what I posted about, strangely haven’t appeared since...
The error is back, and this time it is worse. 
It's been a few months, and I have not seen this occur in a long time, however, as its occurrence is completely random, I'm not going to close this issue...
Discontinued? Is this a recent development? I figured that the 1.12.2 branch of MCFM is discontinued, but the mod in general is still receiving updates, even if MrCrayFish usually takes...
Issue has seemingly been fixed with WTHIT 8.15.1 on 1.20.1.