The Meaning of Life, the Universe, and Everything.
Imho if u're gonna do ussr themed tex pack you better make it a bit exaggerated, like some soviet carvings on trees, red crystal stars shaped redsone ore, maybe black tank platoon shaped coal, something like that.
Maybe even paint grass red so the world has that soviet agitation poster style(painted in 2-3 colours, mainly red, black and yellow). Like on this ones:
Maybe you could find and use clear version of ussr high industrial standart symbol:
PS: forgot to mention a thought about tetris-style destruction pattern -_0