The texture coordinates, or UVWs, are a separate storage
location on a two-dimensional plane. These values
typically range from 0,0 to 1,1, which are the upper-left
and lower-right corners of the image. These UVWs do not
affect the location stored in the XYZ coordinates. It also
works the other way around, as the XYZ coordinates do
not affect the placement of the UVWs.
Using the UVW Map Modifier
A UVW map is nothing more than a gizmo that will unwrap
your object for you. How it unwraps your object is based on
the gizmo of your choosing. You get seven basic presets when
choosing your UVW map: Planar, Cylindrical, Spherical,
Shrink Wrap, Box, Face, and XYZ to UVW. If you wish to
unwrap a box, then of course you would want to choose Box
mapping. If you have a cylinder you wish you unwrap, then
you would choose Cylindrical mapping.
To demonstrate quickly just how the UVW Map modifier
works, let’s create a cube within our Perspective viewport.
The next thing we need is a material that will allow us to see
how our unwrap is working. Open up your Material Editor and
open the Maps rollout.
The Maps rollout has several empty slots available, the
second of which is called the Diffuse Color channel. Diffuse
Color is simply our texture color. You can load many different
things into this slot, such as images, video, procedural tex-
tures, and so on. Click on the empty slot to bring up a very
long list of options. Choose Checker.
348 Chapter 17
Figure 17-6: The
Maps rollout with Dif-
fuse Color checked
and Checker in the