And this is useful, let's say you want to do something that's only going to effect polygons. So with edges now clicking on it does nothing. This seems a little funny at first, but once you start working with this brush you'll actually find it to be fairly useful. Now I'll get into some of the more commonly used actions later on in this chapter, however one that I want to point out right now is one called Do Nothing. Different actions and then different targets or modifiers that can be done to edges.
Now finally let's look at the edges, holding the space bar over an edge, you can see, same type of situation here. Change this to polygroup different modifiers, everyone of these is going to have some sort of different option. So if we change this to extrude for example, there's different modifiers. And then each one of these options is going to have different settings and options as well. And then there's different targets, so there's all sorts of different ways that ZBrush can look at this mesh to decide which ones get effected by this. There's different actions that can be done to it.
So for example if we hover over a polygon, hold down the space bar, we're going to get some very different windows here. Now different actions might have different targets. And then below the point action we've got a little window of options and this is going to set which points are included in this. In the ZModeler brush, we're going to get a pop up that shows us several different actions that we can perform to points. Right now we're hovering over a point, Let's hold down space bar and see what we get. And we can set what the brush does to these components by holding down the space bar while hovering over one of them. Now this brush will do different things on these different components independently. As we hover over our model, you can see that it's highlighting faces, edges and vertices. So let's get the ZModeler brush by hitting B, Z, M, and let's also turn on Polyframe just to make it easier to see exactly what we're working on. Which is generally the type of mesh you want to use with ZModeler, but not always. Okay, so we have a model open that in fairly low poly. Let's take a look at the basic usage of this brush. But with the addition of several new features, including the ZModeler brush, ZBrush can now handle polygon, vertex, and edge level editing, in much the same way that poly modeling programs like Maya and Blender can.
For a long time, ZBrush was considered a software that added finishing details to models, rather than a software for creating the basic meshes in the first place.