The shader graph appears not to work very well with the System Font selected in the editor instead of the default one. The text in general lacks the crispness that make it look good as a font in the rest of the editor.
But the underscore appears as a space in the Graph Inspector, not an underline - bug (2021 LTS)
separate issue - Also why can’t you easily add standard-named inputs to the Blackboard so you can use the same names in code to set common shader variables like BaseColorMap (_BaseColorMap) etc.? I have to manually create and copy naming convention
