diff --git a/lib/geom/Matrix3D.ts b/lib/geom/Matrix3D.ts
index 42ef96bd..516c040f 100644
--- a/lib/geom/Matrix3D.ts
+++ b/lib/geom/Matrix3D.ts
@@ -493,18 +493,18 @@ export class Matrix3D
 		targetData[15] = sourceData[offset + 15];
 
 		if (transpose) {
-			targetData[offset + 1] = sourceData[4];
-			targetData[offset + 2] = sourceData[8];
-			targetData[offset + 3] = sourceData[12];
-			targetData[offset + 4] = sourceData[1];
-			targetData[offset + 6] = sourceData[9];
-			targetData[offset + 7] = sourceData[13];
-			targetData[offset + 8] = sourceData[2];
-			targetData[offset + 9] = sourceData[6];
-			targetData[offset + 11] = sourceData[14];
-			targetData[offset + 12] = sourceData[3];
-			targetData[offset + 13] = sourceData[7];
-			targetData[offset + 14] = sourceData[11];
+			targetData[1] = sourceData[offset + 4];
+			targetData[2] = sourceData[offset + 8];
+			targetData[3] = sourceData[offset + 12];
+			targetData[4] = sourceData[offset + 1];
+			targetData[6] = sourceData[offset + 9];
+			targetData[7] = sourceData[offset + 13];
+			targetData[8] = sourceData[offset + 2];
+			targetData[9] = sourceData[offset + 6];
+			targetData[11] = sourceData[offset + 14];
+			targetData[12] = sourceData[offset + 3];
+			targetData[13] = sourceData[offset + 7];
+			targetData[14] = sourceData[offset + 11];
 		} else {
 			targetData[1] = sourceData[offset + 1];
 			targetData[2] = sourceData[offset + 2];