Here is what GIMP shows:

https://streamable.com/lulp9e

and you can see that it does not have the 2 red rectangles in the 1/3 down right hand side and the blue rectangles in the middle area. I do see some small white areas in modded CinGG around the 2 blue flowers to the left but they are not distracting and it could be because I intentionally made the colored image larger than the flower image so that it was obvious. In other words the alignment is different between Gimp and CinGG.

(I am often guilty of sending big files to the Mailing List so I need to stop!)

On Wed, Nov 9, 2022 at 5:14 PM Andrew Randrianasulu <randrianasulu@gmail.com> wrote:

чт, 10 нояб. 2022 г., 03:04 Phyllis Smith <phylsmith2017@gmail.com>:
A small mod can be applied to improve the Divide overlay as long as no one objects. (most like Gimp). Old projects can use a previous AppImage to get the previous results. The mod seems to fix the minor imperfections you can see in the following screenshots using the Overlay plugin.

     hhttps://cinelerra-gg.org/download/testing/divide_flowers.png (Top first layer order)
In both Cinelerra 7 and Current CinGG, look at imperfection on upper right hand corner about 1/3 of the way down where there are 2 small red rectangles. And there are small dark blue squares scattered around in the light blue areas. These look wrong to me.

can those be amplified compression artefacts? If you load same images into gimp 2.10.xx do you see them?

And what exactly you suggest to change in code? :)

     https://cinelerra-gg.org/download/testing/divide_waterfall.png   (Bottom first layer order)
Entire left hand side just looks ugly for both Cinelerra 7 and current CinGG. I do not think anyone would want this output.

   https://cinelerra-gg.org/download/testing/divide_squares.png    (Top first layer order)
This test is interesting because all 3 look the same with no obvious imperfections.