This document summarizes a study that examined how people perceive objects in technical illustrations at different heights, angles, and actions. The study involved creating illustrations of a person holding or throwing a ball from different camera angles and heights, and having students identify details in the illustrations. Student responses were analyzed to determine accuracy rates and confidence levels for different illustration variables. The analysis found that accuracy was generally high (85-95%) and not significantly different across different body positions, heights or actions. Correlations were identified between some specific illustration viewpoints and confidence levels. The study provides insights into how illustration variables impact object perception.