It seems to me that Adam's examples always involve integers, 8-, 10- or 16-bit, but always integers. Interesting that Adam's Histogram also shows data above 1.0, while in CinGG it happens with Histogram Bezier but not with Histogram (nor with Histogram of Scopes). Adam's waveform also shows data above 100% while CinGG's does not. See attached image. The png is just a screenshot captured to show what the original image looks like, since the contents of the window are not visible in CinGG. The original exr image gives the following result with ffprobe: Stream #0:0: Video: exr, gbrpf32le, 4096x2048 [SAR 1:1 DAR 2:1], 25 fps, 25 tbr, 25 tbn Such an image I simply downloaded from a free archive; I did not build it in Blender or Natron. If you want to try it out it can be found here: https://polyhaven.com/a/small_empty_room_1 I didn't quite understand how to do another "lowering technique" test.
