Sony Camera matching Color Profiles render cloud gradients with weird artefacts and discolouration

I don't see anywhere that the file used in the screenshots has been provided. Is that possible? 

Hi,

Yes, please, that would be very helpful, thank you!

Hi, I will  move the discussion in the relevant (ACR) forum.

Any fixes Adobe? It's been months, and apparently people have had these issues for years.

Well, OK, if that's your point I agree. The camera matching profiles aren't very good.

Where I disagree is that it's important. There is no such thing as a "reference" original raw file. The camera version is no more valid than any other version. It's linear monochrome data, and it has to be interpreted to produce a useful image anyway. Who's to say one interpretation is any better than another. I just want my own interpretation, and I'm always able to do that in ACR/Lr.

I'm not going to start a debate on what I should or shouldn't be able to do with the Calibration tab, or about Capture One's quality, that is not the point.

Secondly, the idea behind the camera matching profiles is to match the camera rendering of the raw previews and makes sense. I don't want to use what Adobe thinks looks natural and I don't know how saying not to use them is helpful since the Adobe profiles render files differently than what the camera previews. That is the issue that I want to be fixed.

Thirdly, it is definitely ACR and not the monitor introducing artifacts. I will attach a new example with the same 100% crop of another photo with the same edits in both programs, +0.5 exposure and +30 saturation. Also, the camera is a Sony A7IV, not an R model.

Update - I was looking at the two Adobe profiles, not the third camera matching. Yes, that looks horrible. Agreed.

Just reinforces my point. Avoid the camera matching profiles. They are hybrid creatures without any sensible purpose.

First of all - why have you pushed red saturation up +48 in the Calibration tab? That's asking for trouble. That's not the way to do it.

Second, I'm not really impressed with the C1 rendering. It's basically monochrome, and everything looks "better" in monochrome, especially gradients and transitions. You have a few areas where the hue changes abrubtly, which are not present in the C1 example because there is no hue change. It's all basically the same hue. That said, given this extreme saturation, I can't say I'm seeing any "artifacts". (EDIT see below) I downloaded the images and cropped out the UI, and are viewing them on on my Eizo CG.

For this to have real relevance, you need to post the exact same crop from the same file. You're not doing that here, so we don't know what we're comparing.

Another thing is your monitor profile. That can introduce artifacts on screen if it's not accurate. Are you using a calibrator?

But I can agree that ACR's camera matching profiles aren't particularly good. I really don't see the point in them. They're attempting to mimic another processing engine, and it's enough to look at the jagged histograms to see that some drastic twists and turns are employed to achieve that. The Adobe profiles treat the data as they are, and will always look better and more natural.

FWIW, I've owned and used every Sony a7r model from II through the current V, and I find that ACR/LrC treat these files beautifully.