diff --git a/packages/viewer/src/systems/door/door-system.tsx b/packages/viewer/src/systems/door/door-system.tsx
index f309a55a..796eafbc 100644
--- a/packages/viewer/src/systems/door/door-system.tsx
+++ b/packages/viewer/src/systems/door/door-system.tsx
@@ -477,17 +477,19 @@ function addLeafSegmentContent({
   for (const seg of segments) {
     const segH = (seg.heightRatio / totalRatio) * contentH
     const segCenterY = segY - segH / 2
-    const numCols = seg.columnRatios.length
-    const colSum = seg.columnRatios.reduce((a, b) => a + b, 0)
-    const usableW = contentW - (numCols - 1) * seg.dividerThickness
-    const colWidths = seg.columnRatios.map((r) => (r / colSum) * usableW)
+    const columnRatios = seg.columnRatios ?? [1]
+    const dividerThickness = seg.dividerThickness ?? 0.03
+    const numCols = columnRatios.length
+    const colSum = columnRatios.reduce((a, b) => a + b, 0)
+    const usableW = contentW - (numCols - 1) * dividerThickness
+    const colWidths = columnRatios.map((r) => (r / colSum) * usableW)
 
     const colXCenters: number[] = []
     let cx = leafCenterX - contentW / 2
     for (let c = 0; c < numCols; c++) {
       colXCenters.push(cx + colWidths[c]! / 2)
       cx += colWidths[c]!
-      if (c < numCols - 1) cx += seg.dividerThickness
+      if (c < numCols - 1) cx += dividerThickness
     }
 
     if (seg.type !== 'empty') {
@@ -496,14 +498,14 @@ function addLeafSegmentContent({
         cx += colWidths[c]!
         addLeafBox(
           baseMaterial,
-          seg.dividerThickness,
+          dividerThickness,
           segH,
           leafDepth + 0.001,
-          cx + seg.dividerThickness / 2,
+          cx + dividerThickness / 2,
           segCenterY,
           0,
         )
-        cx += seg.dividerThickness
+        cx += dividerThickness
       }
     }