OpenSCAD rendering is not multi-threaded. However I noticed that, while rendering one design for STL, I could open another instance of OpenSCAD and render a second design for STL simultaneously (and processor load doubled). Since some of my STL rendering tasks take up to 3 hours, I could run 16 renderings simultaneously from a batch file. They will still take three hours, but after a little more than 3 hours, 16 will be ready (assuming a 16 core processor). It might not be the primary design of OpenSCAD to use it in this way, but can this be done safely? (I guess so)

I used a makefile with make -j to do just this with OpenSCAD to generate images and STLs for my OpenSCAD designed Snappy 3D printer. -Revar > On Aug 7, 2020, at 7:35 AM, peter_osc@xs4all.nl wrote: > >  > OpenSCAD rendering is not multi-threaded. > > However I noticed that, while rendering one design for STL, I could open another instance of OpenSCAD and render a second design for STL simultaneously (and processor load doubled). > > Since some of my STL rendering tasks take up to 3 hours, I could run 16 renderings simultaneously from a batch file. They will still take three hours, but after a little more than 3 hours, 16 will be ready (assuming a 16 core processor). > > It might not be the primary design of OpenSCAD to use it in this way, but can this be done safely? (I guess so) > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org