Shape Complexity Based on Geometrical Attributes There are 6 significant attributes of 3D objects that contribute in visual perception to human regarding their simplicity or complexity. These are namely, surface variation, symmetry, part count, simpler part decomposability, intricate details and topology , based on user conducted survey. Users have presented three types of questions: (1) â€œ2 alternative forced choice (2AFC)â€? (2) perceptual rating, scoring and sorting (3) Multiple choice questions. Results from these questions verifies the information aspect of Shannon theory as well.