The old contrast factor of the bright/contrast node is limited/broken in a couple ways:
- The node only increases contrast between lowlights mid lights (values from 0-0.5)
- The node does not allow to choose a pivot point
The pivot point acts as the point where values are pushed/pulled to.
This new node adds pivot control and affects both highlights and lowlights
Below is an example comparing the results. I tried to match the contrast of the lowlights and mid lights between the examples.