Blender Secrets - Slicing Objects in Sculpt Mode 

Yup.

Just click and hold

Update: I was using mirror filter, but it was not applied. This was the problem. I applied it and the mask worked. Useful to know (for me at least!)!

Maybe check if the scale is applied before going into sculpt mode. (Ctrl+A > Scale in Object Mode)

@@BlenderSecrets That did it! I didn't apply the scale of the object in question before going into sculpt mode. Thank you so much.

@@ssodangi Happy to help!

should work on any mesh, not just human shapes

@@HalValla01 I was being silly. But thank you for replying. It’s v cool!

I already made that video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mk4hNz96acQ.html

@@BlenderSecrets Awesome. Thanks.

Yes just mask the part you dont’ want to remesh, I think (not behind computer now, can’t check for sure)

You can just select both in Object Mode and press Ctrl+J, then do a voxel remesh in Sculpt Mode. That would be my recommendation. In Edit Mode, can be complex. Maybe with a boolean union.

It's actually a bit different. In Zbrush, you have a slice brush that you can use to slice through things. That affects the geometry and it creates new polygroups (Face Sets in Blender). Then you have to go to an option called Fill Holes I think and close the separate poly groups one by one. At least that's how I remember it. I think Blender is a bit faster here as it closes the holes automatically for both objects. Maybe there's a way in Zbrush to slice and automatically fill holes, I don't remember.