Banding on image render

Hello, I am struggling with bad banding on image,

the image seems fine on blender render window, but as soon as I open it in photoshop I can see a banding,

I literally tried with one light on a dark plane, png 16 bit…tif…4096 sampling, full gi preset, no denoise…no luck

https://drive.google.com/drive/folders/1V6OivkeqnHC4jkMZFyu8dK3k6xFVamL3?usp=sharing

any suggestion?

Try half-float exr, and see what happens?

edit: don’t see anything odd on the images tbh… And some banding is to be expected due to the way monitors, color etc. work.

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