Your VR experience will only be pleasing if it is comfortable for the user. Nausea, dizziness, and malaise point to common reasons for VR discomfort and project failure. These issues result from poor planning and optimization of the experience.
Optimizing your VR project involves preparing your environment, graphics, and processes to run smoothly on the intended device. Unity maintains a list of resources and techniques for getting the most out of the Engine. Visit the link https://unity3d.com/learn/tutorials/topics/virtual-reality/optimisation-vr-unity for an extensive look at the performance attributes to consider during development. For the purpose of this book we would like to discuss three key areas; frame rate, geometry reduction, and lightmapping.