diff --git a/src/voxel/_impl/_vx_bezier_impl.scad b/src/voxel/_impl/_vx_bezier_impl.scad
index a9584b4b..27dc82d3 100644
--- a/src/voxel/_impl/_vx_bezier_impl.scad
+++ b/src/voxel/_impl/_vx_bezier_impl.scad
@@ -11,7 +11,8 @@ function _vx_bezier_pt3(p1, p2, p3, p4, pts) =
     _vx_bezier3(c, b2, a3, p4, _vx_bezier3(p1, a1, b1, c, [each pts, p]));
 
 function _vx_bezier3(p1, p2, p3, p4, pts) =
-    (abs(p1[0] - p4[0]) < 0.5 && abs(p1[1] - p4[1]) < 0.5 && abs(p1[2] - p4[2]) < 0.5) ? 
+    let(v = p1 - p4)
+    abs(v.x) < 0.5 && abs(v.y) < 0.5 && abs(v.z) < 0.5 ? 
         pts : 
         _vx_bezier_pt3(p1, p2, p3, p4, pts);
 
@@ -28,6 +29,7 @@ function _vx_bezier_pt2(p1, p2, p3, p4, pts) =
     _vx_bezier2(c, b2, a3, p4, _vx_bezier2(p1, a1, b1, c, [each pts, p]));
 
 function _vx_bezier2(p1, p2, p3, p4, pts) =
-    (abs(p1[0] - p4[0]) < 0.5 && abs(p1[1] - p4[1]) < 0.5) ? 
+    let(v = p1 - p4)
+    abs(v.x) < 0.5 && abs(v.y) < 0.5 ? 
         pts : 
         _vx_bezier_pt2(p1, p2, p3, p4, pts);
\ No newline at end of file