Filmic assumes that it receives a linear scene-referred image.
darktable's standard matrices are just linear transformations of the
demosaiced raw file, so this is fine. However, if you use an input profile
that has some sort of gamma correction, then the data is no longer linear,
and you can use
Can someone please explain the relation between
unbreak input profile (logarithmic mode) and
filmic rgb?
The online manual says, that unbreak is required
for certain input profiles, while some research
on filmic seems to imply that unbreak was sort
of an early version of filmic and they are not
