I just found some old but free plug in for 3dsmax absolutly fantastic.
with that
Paint modifier you can modeling like Zbrush push and pull meshs you can also paint spline on model for preparing path for shag hair (really nice!! I saw video demonstration here and as MahliKus … feint !! :)) )
and many free plug in for 3d painting, displacement particle etc… many tools usefull!! go to plug in section
enjoy !