Noisse removal slider makes no changes

[susanl7866380]

Computer: iMac 24" M-1 Ventura 13.3.1 (a)

Lrc v.12.3

When using the noise reduction slider, the noise levels do not change.  For example: I upload an image and the last amount of noise reduction I used comes up as a default I guess.  If I move the slider to the left as far as it will go (1) the noise level does not change.  If I move it to the right as far as it will go, no change is visible.  Funnily enough, it looks OK on import back to LR.  The photo is free of noise and the details are sharp.  However, I would like to leave a bit of noise in my photos and have the oppertunity to change settings as needed.  Has anyone else noticed this behavior.

Thanks, Susan

[TheDigitalDog]

Do you see this on all images you try, can you try on a very noisy image and let us know?

[susanl7866380]

The image was ISO 5000.  I have tried it on higher ISO images (up to 125000) and not noticed the problem.  I just did one at ISO 4000 and again there was no problem.  I will try to find another photo at ISO 5000 and see if there is some quirk at just that ISO or if it was a one off.

[susanl7866380]

It seems the problem only occurs if using masks first.  Probably isn't wise to use masks first anyway but it doesn't seem to make a difference with Topaz AI so I forget sometimes.  LrC denoise is proving itself to be superior to Topaz in most situations though I still have to use it for sharpening.

[Earth Oliver]

are you viewing the image at 1:1 when judging the noise reduction?

[susanl7866380]

The review on the noise reduction panel is 1:1.  Not sure you can look at it any other way.