(2022-08-29, 18:29)Orion Pobursky Wrote: Backward compatibility mostly. Also, support for the full spec (including GLOSSMAP) isn't consistent.
Having a fallback is kind of automatic, just use a TEXMAP block without the FALLBACK parts and don't use "0 !:" in front of lines.
It will be just a solid color mesh, but it prevents gaps on non texture supporting software.
If such a fallback is what you are going for I'm fine with making it mandatory.
But I don't think you can demand a "vector art" fallback to be mandatory.