Graphics Programs Reference
In-Depth Information
Mapping and Textures
Modeling is like working with clay; it does not give the object the materials
that make it look real. Instead, the default created model is covered with
solid colors only. Thus, materials are important to give the model its inal
appearance and details. The model can have a solid color as a material, or
you can add a texture to it, such as adding a wood texture to a table to give
it the look and feel of wood. When you add a texture to an object, you map
the texture to it the object's polygons or the polygon mesh.
Rendering
The 3D movies and images that we often see these days are not based on
the actual 3D working ile. You need to convert this working version to a inal
output image or video ile for the user to be able to view it. This process is
also useful for protecting the source iles from being stolen. This inal output
is known as the render output .
The render concept is used in both 3D and video, to generate a inal image
output from the 3D source ile. When you generate an image or video
animation from a 3D source ile, it creates a sequenced image animation, a
video, and still image content.
Photoshop and other 3D applications provide diferent types of rendering
options for the document; each rendering option is based on the model
options, such as polygons, edges, and vertices.
In general, rendering is either general Open GL rendering or ray-traced
rendering. The ray-trace rendering process is based on calculating the light
and the shadows applied to the object and around it. However, it is more
resource- and hardware-intensive, compared with the other rendering
methods, which do not provide the same accuracy in rendering lights.
In the following discussion, I mention the rendering options that you will
see in Adobe Photoshop; we will see the rendering in additional detail in
Chapter 12.
Face Render Option
This is the default render option that renders the 3D object as it displays the
polygon mesh with faces and texture. This option is the most commonly
used option when working with 3D iles.
Edge Render Option
This option is based on the edge part in the 3D model; when this
option renders the 3D model, it shows only the edges on the model as
wireframes.
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