Changes

*There is a potentially big rendering penalty. In the naive implementation you have to render two completely different views and composite them. However the lower FOV of the center view makes it less costly to render. Low resolution rendering of the periphery is an obvious optimization that should be considered. For an extreme optimization it might be possible to render the periphery monoscopically or simply as a cube map - although those techniques have potential downside in terms of incorrect parallax.<ref name="tunneling"></ref>

'''Pros''':