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The complexity of an object relates to the number of its vertices and faces.
The more faces a model has, the longer it takes to render. Keep the geometry
of your drawing simple to keep rendering time to a minimum. Use the fewest
faces possible to describe a surface.
Intersecting Faces
Intersecting faces in a model occur when two objects pass through one other.
For conceptual design situations, simply placing one object through another
is a fast way to visualize how something will look. However, the edge created
where the two objects intersect can exhibit a rippled appearance.
In the following example, the edge appears rippled in the left image and much
cleaner after a Boolean union.
When edges do not appear to be as precise as you want, use Boolean operations
like union, intersect, and subtract. A much cleaner and precise edge is created
to better reflect the object’s appearance.
Coplanar Faces
Faces that overlap and lie in the same plane, coplanar faces, can produce
ambiguous results, especially if the materials applied to the two faces differ.
In the following example, artifacts appear when faces occupy the same location.
742 | Chapter 13 Render Drawings