auto-git:

[change] src/document/scene-document-validation.ts
 [change] src/runtime-three/runtime-host.ts

src/document/scene-document-validation.ts

@@ -302,6 +302,17 @@ function validateWorldSettings(
     );
   }
 
+  if (!isBoolean(world.showCelestialBodies)) {
+    diagnostics.push(
+      createDiagnostic(
+        "error",
+        "invalid-world-show-celestial-bodies",
+        "Scene world celestial body toggle must be true or false.",
+        "world.showCelestialBodies"
+      )
+    );
+  }
+
   validateWorldBackgroundSettings(
     world.background,
     document,

src/runtime-three/runtime-host.ts

@@ -2426,6 +2426,17 @@ export class RuntimeHost {
       });
     }
 
+    if (brush.volume.mode === "light") {
+      const lightMaterial = new MeshBasicMaterial({
+        color: brush.volume.light.colorHex,
+        transparent: true,
+        opacity: 0,
+        depthWrite: false
+      });
+      lightMaterial.colorWrite = false;
+      return lightMaterial;
+    }
+
     if (material === null) {
       const faceMaterial = new MeshStandardMaterial({
         color: FALLBACK_FACE_COLOR,