Hello, I have a complex object to 3D print and I'm trying to use the SURFACE function to create the STL from a PNG file. Every attempt, no matter how simple results in "WARNING: PolySet has degenerate polygons". Even using the example files and code from the OpenSCAD documentation pages gives the same result. What could I be doing wrong? I have OpenSCAD 2015.03-2. Thank you, Bob Starkey

Here is an example of the surface function not doing what I expect. I downloaded file BRGY-Grey.png from the OpenSCAD documentation page. CODE: Dshape = "C:\\Users\Bob\Desktop\Random\BRGY-Grey.png"; surface(file = Dshape, center = true, invert = false); Console output: Saved backup file: C:/Users/Bob/Documents/OpenSCAD/backups/dragon-backup-gU249492.scad Compiling design (CSG Tree generation)... Compiling design (CSG Products generation)... WARNING: PolySet has degenerate polygons Geometries in cache: 3 Geometry cache size in bytes: 456 CGAL Polyhedrons in cache: 0 CGAL cache size in bytes: 0 Compiling design (CSG Products normalization)... Normalized CSG tree has 1 elements Compile and preview finished. Total rendering time: 0 hours, 0 minutes, 0 seconds I've tried to find online help besides the mailing list but everything is archived and nothing there seems to address this. Thank you, Bob Bob Kauffman Starkey wrote on 2/14/2023 11:26 AM: > Hello, > I have a complex object to 3D print and I'm trying to use the SURFACE > function to create the STL from a PNG file. Every attempt, no matter > how simple results in "WARNING: PolySet has degenerate polygons". > Even using the example files and code from the OpenSCAD documentation > pages gives the same result. > What could I be doing wrong? > I have OpenSCAD 2015.03-2. > > Thank you, > Bob Starkey > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

On 2/14/2023 8:26 AM, Bob Kauffman Starkey wrote: > I have OpenSCAD 2015.03-2. I can't say that I've used surface() very much, but it *does* work. First, I'd suggest installing a new OpenSCAD.  2015 is a long time ago. If upgrading doesn't fix the problem, perhaps you can supply the problematic PNG file.