Sigmoid module advice and guidance needed

[Christian-B (Christian Bouhon)]

@jandren

Nice example gradients!

There is a very good reason for not having a “exposure slider” in the display transform. The whole scene referred workflow revolves around normalizing middle grey as 0.1845 instead of an arbitrary maximum value to one. This is why the sigmoid module works so well with the already existing scene referred modules! The whole sigmoid curve is actually pinned downed by the observation that middle grey (0.1845) should pass through this module unmodified. All other values on the curve are defined relative to that condition.

There was a slider for this in filmic, “middle grey” but it has been hidden for the same reason as it’s not included in the sigmoid module.

Hello,
Personally, I opted to fine-tune the black, white and mid-gray settings with the “RGB Levels” module.
To avoid making back and forth, would it not be possible to have a link of the slider of the exposure module.

Greetings from Brussels
Christian