Add panorama previews and repair beta export rendering

renderer/block-colors.mjs

@@ -0,0 +1,35 @@
+// Properties such as waterlogged=false must never determine the block's tint.
+export function blockTint(state, biome = "minecraft:plains") {
+  const name = state.split("[")[0].replace(/^minecraft:/, "");
+  if (name === "water") return biome.includes("swamp") ? "#617b64" : "#3f76e4";
+  if (name === "spruce_leaves") return "#619961";
+  if (name === "birch_leaves") return "#80a755";
+  if (name === "redstone_wire") {
+    const power = Number(state.match(/power=(\d+)/)?.[1] || 0);
+    return power ? "#ff3300" : "#4c0000";
+  }
+  const leaves = name.endsWith("_leaves") || name === "vine";
+  if (biome.includes("swamp")) return "#6a7039";
+  if (/savanna|badlands|desert/.test(biome))
+    return leaves ? "#aea42a" : "#bfb755";
+  if (/snow|frozen|taiga/.test(biome)) return leaves ? "#60a17b" : "#80b497";
+  if (/jungle/.test(biome)) return leaves ? "#30bb0b" : "#59c93c";
+  return leaves ? "#77ab2f" : "#91bd59";
+}
+
+export function firstTextureFrame(width, height, animation) {
+  if (!animation) return { x: 0, y: 0, width, height };
+  const w =
+    animation.width || (animation.height ? width : Math.min(width, height));
+  const h =
+    animation.height || (animation.width ? height : Math.min(width, height));
+  const first = animation.frames?.[0] ?? 0;
+  const index = typeof first === "number" ? first : first.index;
+  const columns = Math.floor(width / w);
+  return {
+    x: (index % columns) * w,
+    y: Math.floor(index / columns) * h,
+    width: w,
+    height: h,
+  };
+}