I (possibly) have an elementary understanding of how to adjust the parameters of the filmic module when my raw file contains clipped highlights, for example making use of the threshold control in the reconstruct tab to derive a reasonable image adjustment. But I don’t understand how to handle clipped blacks in the filmic module and would appreciate some advice.
Recent weather conditions in southern UK, with intensely bright (for UK) days and deep shadows in the hilly area where I live, have resulted in many of my photos having both clipped blacks and whites – sometimes in significant amounts. When I look at the histogram in filmic, I find that many of my images have an extremely long tail to the left in the blue channel. It seems to me that even if I have only 1 or 2 pixels clipped on the left, then the highlight reconstruct mask appears completely blue when I attempt to display it, making it unusable and preventing me from setting the threshold control optimally. If I attempt to eliminate the clipping on the left by use of the exposure module, then, because of the very long ‘tail’ on the left I mentioned, I have to greatly increase the exposure, dramatically increasing the clipping in the highlights.
There’s clearly something I’m not understanding about how to handle images that are clipped in both the black and the whites. I would normally expect to get suggestions about using PlayRaw, but then I receive ‘fixed’ versions of my images, the history stacks of which allow me to see what was done to ‘fix’ them. But this does not tell me the principles which lead to that set of adjustments being chosen – I have a ‘prescription’ for fixing those images, but haven’t learned enough to understand how to fix different images.