Perhaps some guys of you know the mask extraction that Zbrush offers. I wondered if this function is available in Blender, too. Well, it is, with the Sculpt Tools UI addon.
The first thing you need is the addon. You can download it here, I am using Blender 2.74 and it works with this version.

The addon offers many functionalities but I would like to focus on extruding meshes from masks painted in sculpt mode. When you installed the addon from the zip file you enable it here:

Sculpt Tools UI Addon

Sculpt Tools UI Addon

In my sample project I used the base male mesh by Jonathan Williamson, thanks a lot for that, you can find it here.

I added a Multiresolution Modifier (Subdiv 3) to it and this is how I started:

Blender base mesh

Blender base mesh

After that I applied the modifier and changed to sculpt mode. I used the mask brush:

Mask brush settings

Mask brush settings

Now it’s time to paint the masks to the model, let’s say you want to extract some gloves:

Painted mask for hands

Painted mask for hands

When you have painted your masks (symmetry on in sculpt mode) press Shift, Ctrl + B keys (the shortcut for the Sculpt Tools UI addon) and select Mask Extract:

Extract from mask

Extract from mask

You get the following result when using this settings:

Extracted gloves

Extracted gloves

You can see in the hierarchy that a new object has been extracted and added to the scene:

Extracted mesh from mask

Extracted mesh from mask

Now you could go ahead and sculpt the new mesh as you like:

Sculpted glove

Sculpted glove

It’s a great addon for various use-cases, I use it a lot.

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