diff --git a/src/voxel/vx_contour.scad b/src/voxel/vx_contour.scad
index 6d24aa81..ae808c63 100644
--- a/src/voxel/vx_contour.scad
+++ b/src/voxel/vx_contour.scad
@@ -1,10 +1,10 @@
 use <_impl/_vx_contour_impl.scad>;
 use <util/sort.scad>;
 
-function vx_contour(points) = 
+function vx_contour(points, sorted = false) = 
     let(
         // always start from the left-bottom pt
-        sortedXY = sort(points, by = "vt"),
+        sortedXY = sorted ? points : sort(points, by = "vt"),
         fst = sortedXY[0] + [-1, -1]
     )
     _vx_contour_travel(sortedXY, fst, fst);
\ No newline at end of file