1. A computer-enabled method of rendering a scene of objects representing physical objects, the method comprising: projecting a first plurality of rays against a scene; aggregating at least a portion of the first plurality of rays that intersect a sub-region of the scene, the sub-region comprising a bounding volume; determining intersections of the at least a portion of the first plurality of rays with the bounding volume in response to the portion of the first plurality of rays intersecting the sub-region exceeding a second predetermined value; aggregating a second plurality of rays that intersect the bounding volume, wherein the bounding volume encloses at least one object of the scene, and wherein the second plurality of rays is a portion of the first plurality of rays; determining intersections of the second plurality of aggregated rays with the at least one object in response to the number of the second plurality of aggregated rays exceeding a predetermined value; and rendering the scene based on the determined intersections.