johncbowman
commented
4 months ago That problem indicates a problem with your graphics driver; nothing to do with svg or pdf. For example, try asy -f eps sphere and view the resulting postscript file. For the solution, see https://asymptote.sourceforge.io/doc/three.html#index-black-stripes or https://github.com/vectorgraphics/asymptote/issues/56
After your and Martin's hard work, gs-10.03.0 was released, with a vulnerability fix for the OCR component. At that point I did not yet have asy-2.88, so I installed gs-10.03.0, ran general tests with dvisvgm and ImageMagick, and then used asy-2.87 to run that infernal sphere test.
An error message: GPL Ghostscript 10.03.0: Can't use an XRef stream before PDF 1.5, ignoring WriteXRefStm directive
The good news was that an svg was created. The bad news is that it was incomplete. gzipped file follows.
sphere-10030-287.svg.gz
The 2.88 release was now available, so I tried that. No error message, but the resulting svg looks as if it started with a similarly missing corner, and then had black lines over the top a bit like a postmark.
sphere-10030-288.svg.gz
I have not yet attempted any other tests with 2.88 except for using 3D in a latex PDF which was ok.
After your comments earlier this week, I'll start here rather than at dvisvgm. If you want to take a break before looking at this I understand, it seems to be a continual pain.