Thank you for sharing, and sorry to hear you haven’t had a good experience with Negative Lab Pro.
This forum exists (at least in part) to help diagnose and fix issues that users are having.
Issues with color can arise from a number of different places. Sometimes the issue can be easily fixed with a tweak to the users digitization equipment (for instance, getting a light table with a better CRI), or by better learning how to use the controls within Negative Lab Pro for adjusting and balancing color.
Other times, though, by examining an issue, I find things that need to be updated inside of Negative Lab Pro itself.
One issue that I’ve found from users who have sent me raw samples has to do with the way that the current Negative Lab Pro camera profiles (v2.0) work with newer Canon and Sony cameras (like your 5D Mk4). In most cases, the problem has been solved by getting a better light table, but the fact that the issue seems to occur more regularly with certain camera models has caused me to experiment more with the profile creation process, into areas that are not currently documented by Adobe.
From digging into this more, I’ve developed an entirely new profile version which will be included for free in version 2.3. It’s uses a different approach that is more resilient across camera models. Here’s an example from a Canon 6D… the left is using the current profile version, the right is the new profile from v2.3.
And just to compare, here is the new profile vs the Camera Faithful profile…
You can see here that Camera Faithful has produced some of the same off colors, particularly in the shadow of the skin on the neck.
(Camera Faithful will be a “more neutral” starting point than the other adobe camera profiles, HOWEVER, it is still intended to be used for positive images, and contains elements within it (like Tone Profiles and Look Tables) that are optimized for positive images. So even though Camera Faithful will be a better starting point that, say, Adobe Color or Camera Standard, it will still distort the negative results.)
So I do want existing users to know that using “Color Model: None” may have some unexpected results. “Color Model: None” simply leaves the camera profile at whatever the user had selected prior to launching Negative Lab Pro. Which is useful for users who want to make their own profile, or experiment with other profiles. But the results will vary considerably based on what camera profile you select prior to launching Negative Lab Pro.
Of course, you should follow the path that gets you the results you want! But I take your feedback very seriously, and I do want to make sure that I’m able to address any color issues you’ve had.
I’d be happy to chat further via email (firstname.lastname@example.org) and look at any raw images you have had issues with. The more input and data I have, the better I can make Negative Lab Pro for everyone!
Creator of Negative Lab Pro