A computer system comprising: a mixed-reality device for displaying a computer-generated scene; one or more processors; and one or more computer-readable hardware storage media having stored thereon computer-executable instructions, the computer-executable instructions being executable by the one or more processors to cause the computer system to optimize late stage reprojection, the late stage reprojection comprising applying late stage corrections to an image after the image has been rendered by the computer system and before pixels of the image are displayed by the mixed-reality device, by causing the computer system to: generate the scene; identify a sub-region within the scene, the sub-region being distinguished from at least one other region in the scene, wherein identifying the sub-region includes identifying a particular element and a boundary around the particular element, wherein the sub-region includes the particular element and the boundary; isolate the sub-region from the at least one other region of the scene; and apply late stage reprojection processing to the isolated sub-region while refraining from applying late stage reprojection processing to the at least one other region; characterized in that: the scene is a multi-layered scene (600; 700) including multiple layers (610, 620, 710), the scene being generated based on a first predicted pose of the mixed-reality device; wherein one layer of the multiple layers completely encompasses the sub-region; and the particular element is identified in response to detecting that a particular movement threshold has been met or exceeded for the particular element in the one layer relative to the mixed-reality device, which has not been met for a movement of other elements in other layers relative to the mixed-reality device. a mixed-reality device for displaying a computer-generated scene; one or more processors; and one or more computer-readable hardware storage media having stored thereon computer-executable instructions, the computer-executable instructions being executable by the one or more processors to cause the computer system to optimize late stage reprojection, the late stage reprojection comprising applying late stage corrections to an image after the image has been rendered by the computer system and before pixels of the image are displayed by the mixed-reality device, by causing the computer system to: generate the scene; identify a sub-region within the scene, the sub-region being distinguished from at least one other region in the scene, wherein identifying the sub-region includes identifying a particular element and a boundary around the particular element, wherein the sub-region includes the particular element and the boundary; isolate the sub-region from the at least one other region of the scene; and apply late stage reprojection processing to the isolated sub-region while refraining from applying late stage reprojection processing to the at least one other region; characterized in that: the scene is a multi-layered scene (600; 700) including multiple layers (610, 620, 710), the scene being generated based on a first predicted pose of the mixed-reality device; wherein one layer of the multiple layers completely encompasses the sub-region; and the particular element is identified in response to detecting that a particular movement threshold has been met or exceeded for the particular element in the one layer relative to the mixed-reality device, which has not been met for a movement of other elements in other layers relative to the mixed-reality device. generate the scene; identify a sub-region within the scene, the sub-region being distinguished from at least one other region in the scene, wherein identifying the sub-region includes identifying a particular element and a boundary around the particular element, wherein the sub-region includes the particular element and the boundary; isolate the sub-region from the at least one other region of the scene; and apply late stage reprojection processing to the isolated sub-region while refraining from applying late stage reprojection processing to the at least one other region; characterized in that: the scene is a multi-layered scene (600; 700) including multiple layers (610, 620, 710), the scene being generated based on a first predicted pose of the mixed-reality device; wherein one layer of the multiple layers completely encompasses the sub-region; and the particular element is identified in response to detecting that a particular movement threshold has been met or exceeded for the particular element in the one layer relative to the mixed-reality device, which has not been met for a movement of other elements in other layers relative to the mixed-reality device. the scene is a multi-layered scene (600; 700) including multiple layers (610, 620, 710), the scene being generated based on a first predicted pose of the mixed-reality device; wherein one layer of the multiple layers completely encompasses the sub-region; and the particular element is identified in response to detecting that a particular movement threshold has been met or exceeded for the particular element in the one layer relative to the mixed-reality device, which has not been met for a movement of other elements in other layers relative to the mixed-reality device.