diff --git a/ShowSolid.lua b/ShowSolid.lua
index 9d3e42f..bf29d6d 100644
--- a/ShowSolid.lua
+++ b/ShowSolid.lua
@@ -46,7 +46,7 @@ local function RegularizeTriMesh( SurfId, DestGrpId, dStep)
             EgtCutSurfTmPlane( FacId, Point3d( dX1, 0, 0), -X_AX(), true) 
             EgtCutSurfTmPlane( FacId, Point3d( dX2, 0, 0), X_AX(), false)
             local LoopId = EgtExtractSurfTmFacetLoops( FacId, 0, DestGrpId)
-            EgtApproxCurve( LoopId, GDB_CA.LINES , 0.01)
+            EgtMergeCurvesInCurveCompo( LoopId, 0.001)
             local TmpSurfId = EgtSurfTmByFlatContour( DestGrpId, LoopId, 0.01)
             EgtErase( LoopId)
             if NewSurfId then