Thanks for this great community! You all have helped me through many technical issues over the years just by looking up existing problems, but this time I come with my own. We merge 3-bracket photos for real estate photography every day, and starting yesterday our merges have unfortunately become extremely wrong.
As you can see in the attached photos, the more natural looking photo is one of the three brackets -- and truthfully a more accurate representation of the final merge (most of the time) just with increased dynamic range. Now you can see the merged image is very poorly combined and oversaturated. I can't find any settings that have changed to make this happen. Currently I don't deghost my HDR merges.
Have any of you experienced this or know how to correct this? Thanks so much for taking the time to read this!
When you merge the photos, you can ask Lightroom to apply an automatic adjustment as well. Maybe you did not do this in the past and now you have checked this option? It's not a big deal however, because these are still normal non-destructive Lightroom edits, so you can simply change anything you don't like. Lower the Saturation and/or Vibrance sliders. It's fairly easy to adjust the oversaturated screenshot in Photoshop (-40 Saturation is all you need), so it should be just as easy to do this on the merged image in Lightroom. And check if perhaps Lightroom applies a different profile than before.
I agree with @JohanElzenga. I think the auto adjustment is creating the look you don't like. Perhaps you had the auto option deselected previously. Try adjusting your basic settings to reduce the saturation. You could also try changing the raw profile.