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[[Multi-resolution shading]] or '''multi-res shading''' is a [[VR]] rendering [[technology]] part of the [[Nvidia]]'s [[GameWorks VR]]. In multi-res shading, the rendering accounts for the distortion caused by the lenses of the [[HMD]]. The center of the image, an area unaffected the distortion, is rendered at high [[resolution ]] than the edges of the image, where distortion occurs. Multi-res shading improves performance without sacrificing image quality.
Normally, an image on a screen, rendered by [[GPU]], is flat. In an HMD, users view the image through lenses that allow the users to focus and increase [[field of view]]. When viewed from lenses, a flat image is greatly distorted. To counter this, the VR runtime software has to perform an extra process to "de-distort" or warp the image before it is passed through the lenses and onto your eyes. Because of this warp process, the edges of the image are compressed and have fewer pixels. Multi-res shading does not render the entire flat image. Instead, it renders the warped image directly, saving the processor from rendering a significant number of pixels.
