On 01/11/13 11:23, Björn Sonnenschein wrote:
> I think that one of the main purposes of the highlights/shadows module is (at 
> least i used to use RT's equivalent for
> that before I switched to DT ) to recover highlights and shadows which were 
> clipped by using the exposure module. For
> example, if you underexpose a landscape photo to prevent clipping sky and the 
> lift the exposure in Darktable using the
> exposure module, the sky will be blown out and there seems to be no way to 
> recover the highlights in darktable. The
> highlights/shadows module won't bring those areas back, nor any other module. 
> So I wonder if this behavior could be
> changed to provide a more flexible workflow when you use the exposure module?

Sounds to me like what you really want to do is raise the gamma rather than 
raise the exposure.  You can do this using
either the midpoint in the levels plugin or by dragging up a central point in 
the tone curve, like the graphs here:

https://en.wikipedia.org/wiki/Gamma_correction

Also, I have a fairly technical explanation about what the highlights/shadow 
module does in this video:

http://www.youtube.com/watch?v=GVrSePtahJg

Regards,

Rob

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