auto-git:

[change] src/document/migrate-scene-document.ts

src/document/migrate-scene-document.ts

@@ -1071,6 +1071,7 @@ function readBoxBrushVolumeSettings(
     };
   }
 
+  if (mode === "fog") {
     const defaults = createDefaultBoxBrushFogSettings();
 
     if (value.fog !== undefined && !isRecord(value.fog)) {
@@ -1098,6 +1099,41 @@ function readBoxBrushVolumeSettings(
         )
       }
     };
+  }
+
+  const defaults = createDefaultBoxBrushLightSettings();
+
+  if (value.light !== undefined && !isRecord(value.light)) {
+    throw new Error(`${label}.light must be an object.`);
+  }
+
+  const light = (value.light ?? {}) as Record<string, unknown>;
+
+  return {
+    mode: "light",
+    light: {
+      colorHex:
+        light.colorHex === undefined
+          ? defaults.colorHex
+          : expectHexColor(light.colorHex, `${label}.light.colorHex`),
+      intensity: readOptionalNonNegativeFiniteNumber(
+        light.intensity,
+        `${label}.light.intensity`,
+        defaults.intensity
+      ),
+      padding: readOptionalNonNegativeFiniteNumber(
+        light.padding,
+        `${label}.light.padding`,
+        defaults.padding
+      ),
+      falloff: readOptionalAllowedValue(
+        light.falloff,
+        `${label}.light.falloff`,
+        defaults.falloff,
+        isBoxBrushLightFalloffMode
+      )
+    }
+  };
 }
 
 function expectEmptyCollection<T extends Record<string, unknown>>(