diff --git a/src/main/java/eu/mihosoft/vrl/v3d/ext/org/poly2tri/PolygonUtil.java b/src/main/java/eu/mihosoft/vrl/v3d/ext/org/poly2tri/PolygonUtil.java
index cd26a796..fd1ee2e0 100644
--- a/src/main/java/eu/mihosoft/vrl/v3d/ext/org/poly2tri/PolygonUtil.java
+++ b/src/main/java/eu/mihosoft/vrl/v3d/ext/org/poly2tri/PolygonUtil.java
@@ -140,7 +140,13 @@ public static List<eu.mihosoft.vrl.v3d.Polygon> concaveToConvex(eu.mihosoft.vrl.
 			}
 			concave = incoming.transformed(orentation2);
 			normal2 = concave.plane.normal;
-			orentationInv = orentation2.inverse();
+			try{
+				orentationInv = orentation2.inverse();
+			}catch (javax.vecmath.SingularMatrixException inex){
+				inex.printStackTrace();
+				reorent=false;
+				orentationInv=orentation2;
+			}
 			if(concave.plane.normal.z <0) {
 				Transform orentation3 = orentation2.rotx(180);
 				concave = incoming.transformed(orentation3);