I dont know about cdmitchell, but what I get and think he might is getting, is that when we place down a red power block (into the map) (Machines, BatteryBoxes, Half, Quarter Slabs) and it either appears black or very darkened, almost so that we can't see its texture. For me it only happens when the block is not directly exposed to sunlight (seems weird, may be a problem with mod?) and it really annoys me because aesthetics arent good.
I use default texure pack and sphax, both are glitching like this.
Thank you for your help! :)