Hi all, there was a question on TeX.sx [1] asking for picture generation support with OpenType fonts. As you may know, it was quite hard to add support for OpenType fonts, it is basically a hack. Due to way this support works, it is not possible to generate pictures using \Picture+ or \Picture* commands which contains Unicode characters (basic ASCII or math should be fine). These characters are replaced just with "x" characters.
I've came with solution which involves loading of `tex4ht` in the PDF mode and converting images from PDF [2]. It was quite involved process, but I found that it is indeed possible to work in the PDF mode. I think that it would be also possible to produce directly HTML if used together with Lua4ht. I need to clean it a bit and produce an extension for make4ht from the code. The more detailed description is in the answer [2], I hope someone will find it useful. Best regards, Michal [1] https://tex.stackexchange.com/q/447602/2891 [2] https://tex.stackexchange.com/a/447852/2891