diff --git a/src/app/App.tsx b/src/app/App.tsx
index a9ae7706..06902f96 100644
--- a/src/app/App.tsx
+++ b/src/app/App.tsx
@@ -417,6 +417,16 @@ function readPositiveIntegerDraft(source: string, label: string): number {
   return value;
 }
 
+function readWaterFoamContactLimitDraft(source: string): number {
+  const value = readPositiveIntegerDraft(source, "Water foam contact limit");
+
+  if (value > MAX_BOX_BRUSH_WATER_FOAM_CONTACT_LIMIT) {
+    throw new Error(`Water foam contact limit must be ${MAX_BOX_BRUSH_WATER_FOAM_CONTACT_LIMIT} or less.`);
+  }
+
+  return value;
+}
+
 function readPositiveNumberDraft(source: string, label: string): number {
   const value = Number(source);
 
@@ -901,6 +911,17 @@ function formatAdvancedRenderingToneMappingLabel(mode: AdvancedRenderingToneMapp
   }
 }
 
+function formatAdvancedRenderingWaterReflectionModeLabel(mode: AdvancedRenderingWaterReflectionMode): string {
+  switch (mode) {
+    case "none":
+      return "Nothing";
+    case "world":
+      return "World";
+    case "all":
+      return "All";
+  }
+}
+
 function formatBoxVolumeModeLabel(mode: BoxBrushVolumeMode): string {
   switch (mode) {
     case "none":