Abstract
Four visibility acceleration techniques for speeding up the form-factor computation are presented and compared in this paper. Three-dimensional axis-aligned bounding boxes (BB), illumination volumes (IVs), and 3D convex hulls (CHs) are some of the methods described. A new method that enhances IVs with 3D axis-aligned BBs (BBIVs) is also proposed. The results of these methods are compared with the uniform space subdivision (USSD) method, which is used as a basis of comparison of the effectiveness of these acceleration methods. In addition, the advantages and the disadvantages of each of the proposed techniques is discussed.
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