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I save at each major stage of processing in ST and check the histogram. Your problems could start at the Wipe stage. Definitely check here and go back if you are clipping and change settings eg gradient aggressiveness. Superstructure & denoise are other areas where blackpoint can be clipped so again...

Thanks for replying and the very clear explanation. Will try what you recommend in DSS.

I've been reading past posts on stacking and aligning frames for processing in Startools. Ivo has given advice on this in the past and two examples read as follows: "It is very important to align all channels during stacking. That's because aligning individual frames will always be more precise than...