Display engine for post-rendering processing

One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

• generate a plurality of ray bundles for casting into an artificial reality scene that comprises one or more surfaces to determine whether the one or more surfaces are visible from a viewpoint, wherein each ray bundle of the plurality of ray bundles comprises two or more rays;
• determine points of intersection between the rays of the plurality of ray bundles and the one or more surfaces by comparing one or more corners of each of the plurality of ray bundles to the one or more surfaces;
• determine, based on the points of intersection, color values corresponding to output positions of a display system;
• access brightness adjustment data corresponding to the output positions of the display system, wherein the brightness adjustment data are predetermined based on one or more non-uniformity characteristics of the display system;
• apply one or more brightness adjustments to the color values based on the brightness adjustment data corresponding to the output positions to which the color values correspond;
• and
• provide the color values for display at the corresponding output positions of the display system.

A system comprising:

• one or more processors;
• and
• one or more computer-readable non-transitory storage media coupled to one or more of the processors and comprising instructions operable when executed by one or more of the processors to cause the system to:
• generate a plurality of ray bundles for casting into an artificial reality scene that comprises one or more surfaces to determine whether the one or more surfaces are visible from a viewpoint, wherein each ray bundle of the plurality of ray bundles comprises two or more rays;
• determine points of intersection between the rays of the plurality of ray bundles and the one or more surfaces by comparing one or more corners of each of the plurality of ray bundles to the one or more surfaces;
• determine, based on the points of intersection, color values corresponding to output positions of a display system;
• access brightness adjustment data corresponding to the output positions of the display system, wherein the brightness adjustment data are predetermined based on one or more non-uniformity characteristics of the display system;
• apply one or more brightness adjustments to the color values based on the brightness adjustment data corresponding to the output positions to which the color values correspond;
• and
• provide the color values for display at the corresponding output positions of the display system.