It's not standard, but there are other terms with their own custom escape codes such as Terminology (from Enlightenment DE) and Kitty (not to be confused with K

It's not standard, but there are other terms with their own custom escape codes such as Terminology (from Enlightenment DE) and Kitty (not to be confused with KiTTY, the fork of PuTTY). There is also the sixel escape sequences will render using 6 pixel character blocks and is supported in xterm with the vt250 (iirc) support enabled. For what it's worth, xterm also supports vector graphics if you enable the right kind of VT mode. But that's a whole other discussion :)