Filmic v4 got merged in darktable master today, along with other changes.
We introduce “workflows” in place of the “auto-apply basecurve” setting:
By default, workflow is set to display-referred, which auto-applies the base curve.
Setting it to scene-referred will auto-apply filmic and exposure module altogether. Exposure will auto-apply +1 EV by default to prepare overall brightness for filmic, plus revert the camera exposure bias in case you exposed to the right with an in-camera exposure bias. Then, filmic v4 will auto-adjust its defaults depending on the exposure bias.
Alternatively, setting workflow to “none” will auto-apply nothing.
OpenCL is for now disabled for filmic v4, since the v4 kernels are not written. Please test it and report weird behaviour, and I will start on the OpenCL in a couple of days, to have it shipped in 3.2.
Please notice that filmic defaults will not fit every needs, and it is impossible to do so. Basically, we have only “classical” assumptions (statistically valid on a large sample of pictures) to work with, no precise information about the true value of the middle-grey for each picture. Filmic defaults aim at fitting most cases but don’t expect anything magical in there. They are only a starting point and you need to tweak them for your special cases. However, I’m confident that these defaults should match OOC JPEG roughly, therefore provide a good base for culling.
Noticeably, Fuji owners will need to add +0.7 EV systematically in exposure module.