High-res ore textures: gold, silver, ruby and diamond as lumps in the earth, no veins

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/render3d.rs

@@ -810,8 +810,8 @@ fn build_chunk(map: &Map, amb: &[f32], glow: &[f32], cx: i32, cz: i32, atlas: &T
             if t.kind == Kind::Mushroom && t.res & MUSH_GROVE != 0 {
                 tex = crate::gfx::T_MOSS + (t.var as u32 & 3);
             }
-            if hd && crate::gfx::hd_tile(tex) {
-                tex = tex / 4 * 4 + (x & 1) as u32 + (z & 1) as u32 * 2;
+            if hd {
+                tex = crate::gfx::hd_tile(tex, x, z);
             }
             let (ua, ub) = cell_uv(tex);
             let (xf, zf) = (x as f32, z as f32);