Can some of you please download and check if this file f6 renders. This is a bit heavy 4mb file: https://github.com/sprabhakar2006/openSCAD/blob/main/render_test.scad f6 render for this file is not working for me. I running openSCAD 2025.08.09 (git 895cd8f96) version on macbook air M1

On 8/16/25 22:33, Sanjeev Prabhakar via Discuss wrote: > Can some of you please download and check if this file f6 renders. > This is a bit heavy 4mb file: > > https://github.com/sprabhakar2006/openSCAD/blob/main/render_test.scad > > f6 render for this file is not working for me. > > I running openSCAD 2025.08.09 (git 895cd8f96) version on macbook air M1 > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org It does not render here. OpenSCAD <https://www.openscad.org/> version 2025.07.15.snap, RockyLinux 9.6, 2011 MacBook Pro w/16G RAM The preview comes up almost immediately. Render hangs at 19/1000. One CPU is pegged at 100%. Jeff

Last proper release version 2021.01 on Windows 10. Preview fine. Render started and after ~3 minute I'm at 130/1000. I'll let it run for a while. On Sun, 17 Aug 2025 at 16:18, Jeff Ross via Discuss < discuss@lists.openscad.org> wrote: > On 8/16/25 22:33, Sanjeev Prabhakar via Discuss wrote: > > Can some of you please download and check if this file f6 renders. This is > a bit heavy 4mb file: > > https://github.com/sprabhakar2006/openSCAD/blob/main/render_test.scad > > f6 render for this file is not working for me. > > I running openSCAD 2025.08.09 (git 895cd8f96) version on macbook air M1 > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > It does not render here. > OpenSCAD <https://www.openscad.org/> version 2025.07.15.snap, RockyLinux > 9.6, 2011 MacBook Pro w/16G RAM > > The preview comes up almost immediately. Render hangs at 19/1000. One CPU > is pegged at 100%. > > Jeff > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

Renders in 26 seconds with the Manifold backend here. -Marius

Thanks everyone I have problem with f6 render and it seems i am not alone facing the same issue. I have manifold selected BTW. Any solution? Please let me know Regards On Sun, 17 Aug, 2025, 10:31 pm Marius Kintel, <marius@kintel.net> wrote: > Renders in 26 seconds with the Manifold backend here. > > -Marius > >

It could be using too much memory - could you try slimming down the model a bit and see if you can get a smaller version to work? -Marius > On Aug 17, 2025, at 13:06, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > > Thanks everyone > I have problem with f6 render and it seems i am not alone facing the same issue. > I have manifold selected BTW. > Any solution? Please let me know > Regards > > > On Sun, 17 Aug, 2025, 10:31 pm Marius Kintel, <marius@kintel.net <mailto:marius@kintel.net>> wrote: >> Renders in 26 seconds with the Manifold backend here. >> >> -Marius >>

Parsing design (AST generation)... Compiling design (CSG Tree generation)... Rendering Polygon Mesh using CGAL... ERROR: The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron. ERROR: The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron. Geometries in cache: 47 Geometry cache size in bytes: 9948176 CGAL Polyhedrons in cache: 1 CGAL cache size in bytes: 88456696 Total rendering time: 0:41:44.608 Top level object is a 3D object: Simple: yes Vertices: 61629 Halfedges: 198678 Edges: 99339 Halffacets: 75424 Facets: 37712 Volumes: 2 Rendering finished. ==== The memory reported by Windows TaskManager says 1.1Gb An empty OpenSCAD 40Mb, after reading the file 130Mb. I did another render, and get new logs: : Rendering Polygon Mesh using CGAL... PolySet has nonplanar faces. Attempting alternate construction PolySet has nonplanar faces. Attempting alternate construction : Previous run I did a preview first (the run time seems to be following the same "speed" .. but cant wait for it to finish) On Sun, 17 Aug 2025 at 18:43, Michael Möller <private2michael@gmail.com> wrote: > Last proper release version 2021.01 on Windows 10. > Preview fine. > Render started and after ~3 minute I'm at 130/1000. I'll let it run for a > while. > > > On Sun, 17 Aug 2025 at 16:18, Jeff Ross via Discuss < > discuss@lists.openscad.org> wrote: > >> On 8/16/25 22:33, Sanjeev Prabhakar via Discuss wrote: >> >> Can some of you please download and check if this file f6 renders. This >> is a bit heavy 4mb file: >> >> https://github.com/sprabhakar2006/openSCAD/blob/main/render_test.scad >> >> f6 render for this file is not working for me. >> >> I running openSCAD 2025.08.09 (git 895cd8f96) version on macbook air M1 >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> >> It does not render here. >> OpenSCAD <https://www.openscad.org/> version 2025.07.15.snap, RockyLinux >> 9.6, 2011 MacBook Pro w/16G RAM >> >> The preview comes up almost immediately. Render hangs at 19/1000. One CPU >> is pegged at 100%. >> >> Jeff >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org > >

Thanks Michael That means it does render after a long time but practically unusable On Sun, 17 Aug, 2025, 11:39 pm Michael Möller, <private2michael@gmail.com> wrote: > Parsing design (AST generation)... > > Compiling design (CSG Tree generation)... > > Rendering Polygon Mesh using CGAL... > > ERROR: The given mesh is not closed! Unable to convert to > CGAL_Nef_Polyhedron. > > ERROR: The given mesh is not closed! Unable to convert to > CGAL_Nef_Polyhedron. > > Geometries in cache: 47 > > Geometry cache size in bytes: 9948176 > > CGAL Polyhedrons in cache: 1 > > CGAL cache size in bytes: 88456696 > > Total rendering time: 0:41:44.608 > > Top level object is a 3D object: > > Simple: yes > > Vertices: 61629 > > Halfedges: 198678 > > Edges: 99339 > > Halffacets: 75424 > > Facets: 37712 > > Volumes: 2 > > Rendering finished. > > ==== > > The memory reported by Windows TaskManager says 1.1Gb > > An empty OpenSCAD 40Mb, after reading the file 130Mb. > > I did another render, and get new logs: > > : > > Rendering Polygon Mesh using CGAL... > > PolySet has nonplanar faces. Attempting alternate construction > > PolySet has nonplanar faces. Attempting alternate construction > > : > > Previous run I did a preview first (the run time seems to be following the > same "speed" .. but cant wait for it to finish) > > > > On Sun, 17 Aug 2025 at 18:43, Michael Möller <private2michael@gmail.com> > wrote: > >> Last proper release version 2021.01 on Windows 10. >> Preview fine. >> Render started and after ~3 minute I'm at 130/1000. I'll let it run for a >> while. >> >> >> On Sun, 17 Aug 2025 at 16:18, Jeff Ross via Discuss < >> discuss@lists.openscad.org> wrote: >> >>> On 8/16/25 22:33, Sanjeev Prabhakar via Discuss wrote: >>> >>> Can some of you please download and check if this file f6 renders. This >>> is a bit heavy 4mb file: >>> >>> https://github.com/sprabhakar2006/openSCAD/blob/main/render_test.scad >>> >>> f6 render for this file is not working for me. >>> >>> I running openSCAD 2025.08.09 (git 895cd8f96) version on macbook air M1 >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >>> It does not render here. >>> OpenSCAD <https://www.openscad.org/> version 2025.07.15.snap, >>> RockyLinux 9.6, 2011 MacBook Pro w/16G RAM >>> >>> The preview comes up almost immediately. Render hangs at 19/1000. One >>> CPU is pegged at 100%. >>> >>> Jeff >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >> >>

Roger. 

On Mon, Aug 18, 2025 at 07:49:56AM +0530, Sanjeev Prabhakar via Discuss wrote: > Thanks Michael > That means it does render after a long time but practically unusable I tested the model on my work-computer while I was at home. I gave up watching the screen not-change, but when I arrived at work maybe 24h later it was rendered! Anyway, the output in the openscad window is: Parsing design (AST generation)... Compiling design (CSG Tree generation)... Rendering Polygon Mesh using Manifold... ERROR: [manifold] Input mesh is not closed! ERROR: [manifold] Surface_mesh -> Manifold conversion failed: NotManifold ERROR: [manifold] Input mesh is not closed! ERROR: [manifold] Surface_mesh -> Manifold conversion failed: NotManifold Geometries in cache: 69 Geometry cache size in bytes: 9927040 CGAL Polyhedrons in cache: 0 CGAL cache size in bytes: 0 Total rendering time: 0:00:02.674 Top level object is a 3D object: Facets: 68578 Rendering finished. So... 3 things: * Manifold thinks it is not manifold. * the render time is not recorded accurately. I didn't give up /that/ fast. I have just re-run my test and this time it previewed taking 10:45 (645 seconds) to preview and then render (F6) in... lets take openscad's word for it, under 3 seconds. Openscad recorded 1 second and 24 milliseconds of "render time" for the preview. That is about 99.7% wrong. Manifold warns, cgal just fails and returns "no geometry". So "completely no results" is consistent with CGAL F6 render. Would exporting the manifold output result in a broken STL that might be fixable? Or maybe help in finding where the original fails to be manifold? IMHO, CGAL was the cause of some meshes ending up non-manifold. Switching to Manifold has helped a lot. Roger. > On Sun, 17 Aug, 2025, 11:39 pm Michael Möller, <private2michael@gmail.com> > wrote: > > > Parsing design (AST generation)... > > > > Compiling design (CSG Tree generation)... > > > > Rendering Polygon Mesh using CGAL... > > > > ERROR: The given mesh is not closed! Unable to convert to > > CGAL_Nef_Polyhedron. > > > > ERROR: The given mesh is not closed! Unable to convert to > > CGAL_Nef_Polyhedron. > > > > Geometries in cache: 47 > > > > Geometry cache size in bytes: 9948176 > > > > CGAL Polyhedrons in cache: 1 > > > > CGAL cache size in bytes: 88456696 > > > > Total rendering time: 0:41:44.608 > > > > Top level object is a 3D object: > > > > Simple: yes > > > > Vertices: 61629 > > > > Halfedges: 198678 > > > > Edges: 99339 > > > > Halffacets: 75424 > > > > Facets: 37712 > > > > Volumes: 2 > > > > Rendering finished. > > > > ==== > > > > The memory reported by Windows TaskManager says 1.1Gb > > > > An empty OpenSCAD 40Mb, after reading the file 130Mb. > > > > I did another render, and get new logs: > > > > : > > > > Rendering Polygon Mesh using CGAL... > > > > PolySet has nonplanar faces. Attempting alternate construction > > > > PolySet has nonplanar faces. Attempting alternate construction > > > > : > > > > Previous run I did a preview first (the run time seems to be following the > > same "speed" .. but cant wait for it to finish) > > > > > > > > On Sun, 17 Aug 2025 at 18:43, Michael Möller <private2michael@gmail.com> > > wrote: > > > >> Last proper release version 2021.01 on Windows 10. > >> Preview fine. > >> Render started and after ~3 minute I'm at 130/1000. I'll let it run for a > >> while. > >> > >> > >> On Sun, 17 Aug 2025 at 16:18, Jeff Ross via Discuss < > >> discuss@lists.openscad.org> wrote: > >> > >>> On 8/16/25 22:33, Sanjeev Prabhakar via Discuss wrote: > >>> > >>> Can some of you please download and check if this file f6 renders. This > >>> is a bit heavy 4mb file: > >>> > >>> https://github.com/sprabhakar2006/openSCAD/blob/main/render_test.scad > >>> > >>> f6 render for this file is not working for me. > >>> > >>> I running openSCAD 2025.08.09 (git 895cd8f96) version on macbook air M1 > >>> > >>> _______________________________________________ > >>> OpenSCAD mailing list > >>> To unsubscribe send an email to discuss-leave@lists.openscad.org > >>> > >>> It does not render here. > >>> OpenSCAD <https://www.openscad.org/> version 2025.07.15.snap, > >>> RockyLinux 9.6, 2011 MacBook Pro w/16G RAM > >>> > >>> The preview comes up almost immediately. Render hangs at 19/1000. One > >>> CPU is pegged at 100%. > >>> > >>> Jeff > >>> > >>> _______________________________________________ > >>> OpenSCAD mailing list > >>> To unsubscribe send an email to discuss-leave@lists.openscad.org > >> > >> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org -- ** R.E.Wolff@BitWizard.nl ** https://www.BitWizard.nl/ ** +31-15-2049110 ** ** Verl. Spiegelmakerstraat 37 2645 LZ Delfgauw, The Netherlands. ** KVK: 27239233 ** f equals m times a. When your f is steady, and your m is going down your a** is going up. -- Chris Hadfield about flying up the space shuttle. ** 'a' for accelleration.