Nuke the “nomipmaps” line from your rock shader. Glitter it may, but you’re punishing your video card with texture/memory thrashing and hurting framerate.
Nah, I’m willing to take that hit for the effect - the caves are fast to draw (200+fps at the mo, sans detail at the mo), and the glittering isn’t everywhere, just here and there as an added effect. As an example:
Trust me, it looks better when animating and you are moving, but the main point is it’s only a small effect so graphics card be blowed 