Curvemeister Forum

1. Set the two neutrals in RGB and worked on these points. My concern is I have lost some highlight detail.
2. I tried Lab and used the thresholds on the highlight and shadow and then some curve rotation on the a and b channels.
3. This time I started in Lab and I set shadow, highlight and shadow markers and worked on the L channel.  I think I had better success with Lab.

The door frame does present a problem for this image...The real lesson is in using multiple neutrals in RGB to get the tonality right...and an effect from CM where you can use a single point to adjust all the channels. 

Your LAB image is better than you RGB but you have room in the RGB to make adjustments..Play around a bit and see if you can get the highlight details back.

Greg