diff --git a/src/viewport-three/viewport-host.ts b/src/viewport-three/viewport-host.ts
index 6c50bb94..3480b804 100644
--- a/src/viewport-three/viewport-host.ts
+++ b/src/viewport-three/viewport-host.ts
@@ -2194,10 +2194,20 @@ export class ViewportHost {
     this.terrainBrushPreviewLine.material.dispose();
     this.terrainBrushPreviewCenter.geometry.dispose();
     this.terrainBrushPreviewCenter.material.dispose();
+    this.terrainGridResizeEdgeOutline.geometry.dispose();
+    this.terrainGridResizeEdgeOutline.material.dispose();
+    this.terrainGridResizeEdgeTube.geometry.dispose();
+    this.terrainGridResizeEdgeTube.material.dispose();
     this.terrainGridResizeEdgeLine.geometry.dispose();
     this.terrainGridResizeEdgeLine.material.dispose();
+    this.terrainGridResizeArrowShaftOutline.geometry.dispose();
+    this.terrainGridResizeArrowShaftOutline.material.dispose();
+    this.terrainGridResizeArrowShaft.geometry.dispose();
+    this.terrainGridResizeArrowShaft.material.dispose();
     this.terrainGridResizeArrowLine.geometry.dispose();
     this.terrainGridResizeArrowLine.material.dispose();
+    this.terrainGridResizeArrowHeadOutline.geometry.dispose();
+    this.terrainGridResizeArrowHeadOutline.material.dispose();
     this.terrainGridResizeArrowHead.geometry.dispose();
     this.terrainGridResizeArrowHead.material.dispose();
     this.environmentBlendCache.dispose();