I've never been quite happy with LR's denoise algorithm, and I never really liked any of the PS solutions, which required a lot of masking to prevent the loss of details, leaving you with a noisey subject and smoothed background. So I acquired Topaz Denoise AI to try it out. Here's a recent shot of mine and one of my worst offenders. ISO5600 on a D800 shot at f/1.6 with only lights from the sparklers to light the subjects. Full Shot - LR without denoise. (just realized the cropped out the bottom portion of the frame, whoops) Full Shot - LR with 30% denoise. This is how I exported and delivered it. Full Shot - LR with 98% denoise. This is the least amount of DR to get the noise almost smoothed away. Full Shot - Topaz Denoise AI. Look at the difference in fine details between this and above, look at how much better the noise is removed as well. 1:1 - LR without denoise. 1:1 - LR with 30% denoise. 1:1 - LR with 98% denoise. 1:1 - Topaz Denoise AI. Pretty damn impressive. It did do weird things to the texture of the suit, and this was a pretty extreme example, and all I did was push the auto button. I have a few old shots I wanted to simply remove the noise pattern in shots, so I'm going to try to run them through and see how it looks.