Computer Aided Design (CAD) has been crucial to the engineering design process since the 1960s due to the ability to create 2D and 3D design representations and easily incorporate design changes without the cost of physical prototypes. However, CAD is hindered by its hardware displaying 3D objects as 2D representations, causing a loss of realism compared to a physical prototype. This paper seeks to observe if increasing the realism of interaction between subjects and virtual prototypes using virtual reality hardware will affect users ability to analyze the assembly model for errors. For this end, an experiment asked participants to perform a design review of assembly models and determine if they successfully form a cube without deformations or voids in four different environments. The environments ranged from low to high levels of immersion controlled through the use of two factors: movement of user’s point of view and assembly rotation. It is expected the highly immersive VR environment will allow for improved assembly reviews due to the increased realism of the virtual prototype.

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