Graphics Reference
In-Depth Information
Fig. 8.1 The model on the left contains over half a million triangles. The model on the right has
482 triangles
your resolution ceiling. With this method, your work will probably progress more
quickly, but you are also less likely to include details that might otherwise have
become a part of your model.
Organic models usually look better if they start as high res objects and are then
derezed (Fig. 8.1 ). This is because it is very diffi cult to predict from a low-res model
how to infl ate vertices to the position necessary to fi ll in missing curvature detail.
Mechanical and architectural subjects do not lose a great deal when started as a low-
res object and then detail is added until a resolution limit is met.
8.3
Hidden Faces and Open Geometry
Do not build polygons to represent detail that will always be hidden from view
(Fig. 8.2 ). For example, a bookshelf that has its back to a wall contains faces that
cannot be seen. If the bookshelf will not be animated away from the wall, the wall
won't be broken from the other side, and no other event could possibly expose its
missing backside, then don't build it.
Leaving hidden faces out of your models creates open geometry . This is distinct
from a solid model , which is a model that has no breaks between polygonal edges,
making it completely sealed from all sides. Solid models are preferred when they
will move a great deal or if the camera will move around them so it is reasonable to
expect that the camera will expose at least part of every face of the object.
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