One of the basic features that both Blender and Zbrush have is the ability to sculpt along a specific axis.
In Zbrush, if you uncheck the x,y,z icons for the modifier under Transform and turn on only the x or y or z axis and draw a brush, the face will only be sculpted along that axis.
Blender also has this same functionality in its brush settings.
Why does such a popular tool have this feature built-in?
I’m surprised I’m the first one to mention it, but I’m just surprised that there are any.
Basically, there are many cases where you might only need to sculpt in a specific axial direction. I guess the most classic would be to create a height field.
I’m sure there are a lot of people who don’t need that, but I think that would make the tool very simplistic and lock it in as a tool for certain people.
I look forward to seeing axial sculpting added whenever it happens.