It works the same, in other app i can split beard, cape etc, in tweak room it selects as one part, also it's too slow. And for fixing model we need sculpt room tools.
Via tools import for fixing model for 3d print, there is inverted overlapping surface what need to be fixed and this part i cannot separate, in other software i can select and detach this element.
I cannot to separate elements. "Separate disconnected parts" works not for all elements what i can select in other software. here model https://mega.nz/file/pVZBybbB#SfDQnh_2XUm4ecIyTEMCMRJOj7E_NFDEZxdCWkyOkOE
1. there is several tools what can extrude depend of your need as new object etc. brush engine you can adjust so it can work as extrude. You need to see how selection works on E key, there are various methods to draw area like lasso, also spline can be used by tools along curve or fill inside curve area(RMB on curve or in curve tree or with enter key in some case).
3.
2022-01-20 23-25-09.mp4
Yes it works for me. Make sure you are using latest build and try to reset tool, maybe you was change extrusion mode for example
you can draw with lasso (E key to choose) like in zbrush mask. But in pose tool i also notice some bug with deselection, sometimes clear selection button is not working, you should draw again and then it start to work
That's because you have two mesh intersections, one you previewing for import, another what you already imported on layer. If you change to any other tool than import, it will looks normal with default shader