In this video, Emmanuel Henri demonstrates the basics of using UV Master with a base model for unwrapping and mapping UVs with your mesh.
- [Instructor] UV Master is a great tool within ZBrush that allows you to quickly unwrap and map UVs on your mesh. If you've never done UV mapping, this is the process of projecting a 2D map over a 3D model, mapping UVs onto your model. Each polygon of your model is tied to a UV on your map. This is useful for placing pictures over your model, or painting in specific polygons on your mesh. So let's go and grab from the lightbox the base model, so let's go and grab the demo head here.
You can double-click on it. Once you have it open, let's go ahead and bring up the UV Master, so you can grab it from the Zplugin, and then UV Master. So what I'm going to do is simply bring this menu on top in my menu here, so I have access to it at all time, and then simply click on UV Master. So as you can see, there's a few things here, and we're going to go through some of them as we actually do our UV map.
So the first thing we need to do is click on Work On Clone, so we don't want to do a UV map over the main head here, we want to do a clone and then copy the UVs from the clone to the actual demo head after we're done working. So we're going to click on Work On Clone. So as you can see, we have a lower resolution model here, so we don't have as many polygons as we had on the main demo head, because we need to unwrap UVs on to this model, and we want to make sure that we can see our polygons here.
So the next step is to unwrap, so what we're going to do is click on Unwrap, so we can create a UV map, so we have officially a UV map. So you can't really see it. If you want to see it, what you need to do is click on Flatten, like so. So this is the UV map that we just created from our model. But we can probably do a better job than this one, because if we click on Unflatten, and you go back to your model, and you click on CheckSeams, you're going to see that right now this is not where we want our seams.
So if we were to add a texture to this, and let's go ahead and grab a texture so we can see our UV map. So I'm going to go and go to the main tool, so I'm going to click on Plugin, close it, and then in the tools, I'm going to go to Textures. Let's go and click here, and I already have the proper texture, but let me show you where you can grab the proper texture for UV map. So you can click on Import, and go inside of the ZBrush directory, and this is on Windows, it's the same on Mac, and then click on Ztextures, and UVMaster_checkers.
Select the checker you want. These are a little bit bigger, and these are a little bit smaller, so I'm going to go with the smaller one, and then Open. So as you can see, our seams are right in the front here, so this is not what we want. So we'd like to have it in the back as opposed to the front because otherwise, when you start painting, or putting pictures over our model, we're going to see the seams in the front of his face as opposed to the back here. So we want to make sure that we change that. So let's put Texture off for now, and then let's go back to our Plugin tool, UV Master, and then remove the seams, so CheckSeams off, and the way you actually change where you actually have your seams is by enabling Control Painting, so let's click on that.
And now what we're going to do is protect the area we don't want to have any seams, so the front of the face. So let's click on that. What I'm going to do is also increase the draw size of my brush, and then we'll just paint red where we don't want to see any seams. Now if you see now, the face will be protected from seams, so let's also protect the ears. Let me just make a smaller brush. And by the way, I have symmetry on right now, so let's protect this, and maybe a little bit of the chin here.
We should be good with that. And where I want to have the seams is in the back. So what we're going to do is now Attract. By clicking Attract, you can go to the back. So I'm going to make it full frame here, 'cause I'm in a very high resolution here, so I can't really see my model. So let's go and basically draw where we actually want to have where seams would like to be, like so. So as soon as you have the areas where you want to protect, and where you want to attract the seams, you can basically click on Unwrap, and the map will be redrawn.
The other thing I want you to pay attention to is the Erase, so you could erase any of that if you want as well, and start over. So let's go ahead and Unwrap, and now we have a new UV map, so let's go and click on our UV map by clicking on Flatten, and check it. So as you can see, we have a very different UV map. And you can also Unflatten, check the seams, as you can see, they're in the back where it should be, and if we really want to check all this, we could actually go to our Textures, and put the textures on, and as you can see, the seams are in the back where we want them, so this is awesome.
The last step of UV Master is to copy those UVs to the model that we had. So the way you do this is simply by copying UVs by clicking here, and then selecting the original head, which was this one here, and then, go to our UV map, and, Paste UVs, like so. And now we have our UV map to this 3D model.
So as you can see, UV Master is a very useful and powerful tool to create your UV maps.