Polarization/Banding Issue

Software Filmulator
1

Hi :slight_smile:

First of all: thank you a lot for this great raw editor the results I can get from such a fast and intuitive workflow are amazing!

Issue
I noticed that a lot of times I see severe banding/posterization in shadow and midtone regions of the image. The position of this banding can easily be changed by the highlight rolloff slider. Not sure why this is happening. It appears in cases of light or of high tonal compression where other editors (darktable or lightroom) would not show any posterization. Not sure if this is a bug, user error or an inherent property of the algorithm.
Maybe you can help me with that :slight_smile:

Example
Highlight rolloff at 0.19

image
image2134×1176 512 KB

Highlight rolloff at 0.24

image
image1989×1273 514 KB

Drama is at 76

2

Could you upload the raw?

Highlight rolloff is not the usual tool for tonal compression, it’s for taming wonky colors in data before you do tonal compression.