Figure 3 - In this relatively dark, slowly-changing synthetic scene, rameless rendering is quite successful in sampling at both 15% and 30% pixel sampling rates. The only artifacting visible in the scene is the expected increase in noisy pixel flicker, somewhat visible in the brighter regions, in particular at 50k pixels/frame.

The frameless rendering sampler demonstrates its shortcomings in this more reasonably moving sequence. Sampling over 50% of the data from frame to frame, it loses substantial image quality. Comparing the image quality to sampling 33% less data demonstrates that much of the quality loss actually stems from the high tolerance required to keep the priority queues manageable for such a scene where every pixel changes from frame to frame. The tolerance creates unpleasant streaking and blockiness over time as lower detail regions of the image are smeared out over time, like a poor video compression algorithm. While the human visual system may be tolerant of moderate random flickering in video, it is extremely intolerant of the artifacts of the threshold required to make the frameless rendering queue implementable in reasonable hardware.