Validation of CG Models - An Introduction to Computer Graphics for Artists - page 139

9.5 Optimization

9.5.1 Introduction

If you have cleaned up the likeness, technical, and construction errors mentioned
earlier in this chapter, your model should be fairly well optimized. There are few
optimization-specifi c items to consider, but they should be checked before you
move on to organizing your model.

9.5.2 Excessive Edge Loops

An edge loop is a group of edges that encircles your object to make a continuous
ring of edges (Fig. 9.31 ). These are essential for joint structures in characters and
other things that must fl ex during animation. They add many new faces to a model
because they affect the entire circumference of the part they are added to, so they
should be used sparingly and only with a good reason. If you don't need them for
animation, it is worth checking to see if some of the new faces created by this tool
can be collapsed.

Fig. 9.31 The edge loops in one axis at the corner of this carton are useful for folding the fl ap, but
in the other axis they add nothing to the model