backres = DefineNumber[10000, Name "Parameters/backres" ]; frontres = DefineNumber[10000, Name "Parameters/frontres" ]; Point(1) = {750000, 0, 0, frontres}; Point(2) = {0, 0, 0, backres}; Point(3) = {150000, 0, 0, frontres}; Point(4) = {350000, 0, 0, frontres}; Point(5) = {450000, 0, 0, frontres}; //+ BSpline(1) = {1, 5, 4, 3, 2}; Extrude {0, 20, 0} { Line{1};Layers{10};Recombine; } Physical Surface(1) = {5}; Physical Line(1) = {1}; Physical Line(2) = {2}; Physical Line(3) = {3}; Physical Line(4) = {4};