The very first thing that I teach my students about ZBrush is that it won't respond or react in the way you think it will, so get used to it! But good news, ZBrush for iPad is a lot easier to learn (and teach) thankfully and in the few weeks since it was released artists are generally agreeing with that statement.
I actually like the fact that it's a little different and once you understand some of those quirks and oddities it's an amazing experience. In recent weeks I've been doing a range of articles here on Creative Bloq helping people understand ZBrush for iPad, get an idea of how it could fit into their creative life and also some watch-outs for new users.
Subtools are the ZBrush way of staying a hierarchical menu of the models (ZTools) in a given set (SubTool). It is very straightforward and uses a common method of having a folder to put model sets into.
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