I will try to run some more tests on more scenes in coming days and post the results here. I’m sorry if I didn’t test the specific denoiser you wanted to see. Different prefiltering settings of OIDN ( None and Fast), a complex multi-pass OIDN denoising setup in the compositor, NLM, NLM temporal denoising, temporal re-projection like Statix talked about, etc. There are more denoising setups that could be tested. The scene used for testing is a slightly modified version of the “ Classroom” scene from this site: Demo Files.I also believe 7.3 is the version of OptiX used by the Blender build bot. I know 7.4 exists, and it may produce better results, but I personally used 7.3 in my testing. So keep that in mind for your own projects. How noticeable flicker is with each denoiser will change as you adjust the frame rate. The frame rate has been increased to 30fps.Although my testing was rather limited and it may in fact be better with Animated Seed turned on (I will do more testing). However it should be noted that adaptive sampling does kind of act like an animated seed. I personally found that having Animated Seed off helped OptiX temporal denoising, so that’s why I did it. In these renders I had Animated Seed turned OFF.As a side effect of adaptive sampling being used, the PMJ sampling pattern is being used.The 0.01 is the Noise Threshold setting for that specific render as the sample count was set to 4096 and adaptive sampling was enabled to achieve a specific noise level. It will be something like 0.01 - OptiX Standard. You will find the name of each render at the bottom of the screen.OIDN is OIDN 1.4 with prefiltering set to Accurate and making use of Albedo and Normal passes.OptiX Temporal is making use of the new temporal denoising feature with the Albedo, Normal, and Vector render passes.OptiX Standard is me going into Blender and turning on OptiX denoising with Albedo and Normal maps for the final render.OptiX Standard, OptiX Temporal, and OIDN.
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