diff --git a/src/core/transform-session.ts b/src/core/transform-session.ts
index 69a767d6..3889f284 100644
--- a/src/core/transform-session.ts
+++ b/src/core/transform-session.ts
@@ -634,6 +634,12 @@ export function cloneTransformPreview(
         size: cloneVec3(preview.size),
         geometry: cloneBrushGeometry(preview.geometry)
       };
+    case "brushes":
+      return {
+        kind: "brushes",
+        pivot: cloneVec3(preview.pivot),
+        items: preview.items.map(cloneBrushTransformPreviewItem)
+      };
     case "modelInstance":
       return {
         kind: "modelInstance",
@@ -641,6 +647,12 @@ export function cloneTransformPreview(
         rotationDegrees: cloneVec3(preview.rotationDegrees),
         scale: cloneVec3(preview.scale)
       };
+    case "modelInstances":
+      return {
+        kind: "modelInstances",
+        pivot: cloneVec3(preview.pivot),
+        items: preview.items.map(cloneModelInstanceTransformPreviewItem)
+      };
     case "pathPoint":
       return {
         kind: "pathPoint",
@@ -652,6 +664,12 @@ export function cloneTransformPreview(
         position: cloneVec3(preview.position),
         rotation: cloneEntityTransformRotationState(preview.rotation)
       };
+    case "entities":
+      return {
+        kind: "entities",
+        pivot: cloneVec3(preview.pivot),
+        items: preview.items.map(cloneEntityTransformPreviewItem)
+      };
   }
 }