Not sure why you want the frame the same thickness as the centre, a simpler solution is ////////////////////////////////////////////// $fn=100; LB=127; linear_extrude(1){       difference(){           square(LB);           translate([7.5,7.5])square(LB-15);       }           translate([0.3,0.3,0])           import("P:/Docs/openscad/wallpaper2.svg");    } ///////////////////////////////////////////////// which renders with no errors under OpenSCAD version 2022.11.18.ci12805 (git 1746d5a83) Your version produces warnings wrt holes, but still renders OK. If you want a thicker frame, then may be best to superimpose it on the version above. On 21/05/2023 18:11, Karl Exler wrote: > > $fn=100; > > path="wallpaper2.svg"; > > LB=127; > > > difference() > > { > > cube([LB,LB,1]); > > translate([7,7,-0.1]) > > cube([LB-15,LB-15,1.2]); > > }; > > translate([0.3,0.3,0]) > > //scale([0.056,0.056,1]) > > linear_extrude(1) > > import(path); >