diff --git a/src/document/scene-document-validation.ts b/src/document/scene-document-validation.ts
index e4d66d2d..57ec8226 100644
--- a/src/document/scene-document-validation.ts
+++ b/src/document/scene-document-validation.ts
@@ -19,9 +19,16 @@ import {
   type TriggerVolumeEntity
 } from "../entities/entity-instances";
 import { type InteractionLink } from "../interactions/interaction-links";
-import { BOX_FACE_IDS, BOX_VERTEX_IDS, hasPositiveBoxSize, isBoxBrushVolumeMode } from "./brushes";
+import {
+  BOX_FACE_IDS,
+  BOX_VERTEX_IDS,
+  MAX_BOX_BRUSH_WATER_FOAM_CONTACT_LIMIT,
+  hasPositiveBoxSize,
+  isBoxBrushVolumeMode
+} from "./brushes";
 import type { SceneDocument } from "./scene-document";
 import {
+  isAdvancedRenderingWaterReflectionMode,
   isAdvancedRenderingShadowMapSize,
   isAdvancedRenderingShadowType,
   isBoxVolumeRenderPath,
@@ -87,6 +94,10 @@ function isPositiveInteger(value: unknown): value is number {
   return isFiniteNumber(value) && Number.isInteger(value) && value > 0;
 }
 
+function isPositiveIntegerInRange(value: unknown, max: number): value is number {
+  return isPositiveInteger(value) && value <= max;
+}
+
 function isBoolean(value: unknown): value is boolean {
   return typeof value === "boolean";
 }
@@ -457,6 +468,17 @@ function validateWorldSettings(world: WorldSettings, document: SceneDocument, di
       )
     );
   }
+
+  if (!isAdvancedRenderingWaterReflectionMode(advancedRendering.waterReflectionMode)) {
+    diagnostics.push(
+      createDiagnostic(
+        "error",
+        "invalid-advanced-rendering-water-reflection-mode",
+        "Advanced rendering water reflection mode must be none, world, or all.",
+        "world.advancedRendering.waterReflectionMode"
+      )
+    );
+  }
 }
 
 function validatePointLightEntity(entity: PointLightEntity, path: string, diagnostics: SceneDiagnostic[]) {
@@ -1401,6 +1423,17 @@ export function validateSceneDocument(document: SceneDocument): SceneDocumentVal
             )
           );
         }
+
+        if (!isPositiveIntegerInRange(water.foamContactLimit, MAX_BOX_BRUSH_WATER_FOAM_CONTACT_LIMIT)) {
+          diagnostics.push(
+            createDiagnostic(
+              "error",
+              "invalid-box-water-foam-contact-limit",
+              `Water foam contact limit must be a positive integer between 1 and ${MAX_BOX_BRUSH_WATER_FOAM_CONTACT_LIMIT}.`,
+              `${path}.volume.water.foamContactLimit`
+            )
+          );
+        }
       }
     }