Hello people.
i don't usually use Gregtech, but I was working on a (private) quick modpack port for someone else) and while using the X-ray mod to admire my hopelessly cluttered oregen, I noticed all these blocks that rendered as if they were smooth stone.
Display Spoiler
On closer inspection, those turned out to be Gregtech ores, that only started to render their coloured content, like black for coal, yellow for gold, etc. after I actually uncovered them.
Is this a cheat-prevention option of Gregtech?
Is there any estimation of how much all these ores hiding their true nature slow down the game?
All in all, I think it's pretty impressive if this is intentional.