Graphics Reference
In-Depth Information
After deleting the existing UVs for the bottle, you will still see some geometry and UV space.
These are the UVs used for the liquid mesh layer. By moving to that mesh layer, you will be
able to delete or edit those UVs as well.
Now that you have a clear UV space, double-click on the label polygons and press Shift+H to hide the
rest of the model. Because you need to map an image onto only the label, you can hide the rest of the bottle
while working on the UVs.
Because the label consists of a simple cylinder shape, the UV Projection tool will be your best option for
creating clean UVs. Click the UV Projection Tool button at the top of the UV controls. Set the Projection
Type to Cylindrical and the Axis to Y. Click in the UV workspace to engage the tool.
With these settings, the label geometry will be spread out evenly across UV space. One problem with this
type of UV creation is that the resulting UV map will not be at a one-to-one ratio with the geometry in 3D
space. In other words, the image map will be stretched (in this case vertically) to fill the square UV space.
Even though the label will fit cleanly into a square, the image map that you need to create for this label will
still need to be proportionate to the label in 3D space. It is possible to scale the UVs vertically so that the
label in UV space is proportionate to the label in 3D space. However, this will result in a mapping issue
when creating the image for the label: to fit the label into the square UV space, there will be empty space in
the UV map. You would need to create corresponding empty space in any image map that would be mapped
using this UV. By creating an image map that has the correct proportions for the label model and using the
stretched UV map, the image will map correctly onto the model. After creating this UV map, you can add a
new texture layer to the label material and load the image map for the label. When this is completed, your
model should look something like the image shown in Figure 3-25 .
Figure 3-25: The bottle with all textures in place
 
 
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