There is also something funny with ZBrush: it was natively a 2D/2.5D program!

So a long way for be a sort of 3D "monster" ! (more than 16 years! )
And the same number of years for finally be used in French !!! (and other languages)

Of course a certain learning curve is necessary!
It's a labyrinthine program! ;)

It was a precursor...copied by all... MudBox, 3DCoat, Blender etc...