I have an SVG with gradients. Postprocessing it with GIMP 2.8 produced banding due to its rasterization which is only 8bit/channel. I downloaded Gimp 2.10, then set channel precision 16bit, imported directly from Inkscape as SVG, yet the banding was there as before. Then I installed Inkscape 1.0.1, exported as 16bit PNG, imported to Gimp 2.10. Gimp shows 16bit/channel, but the banding is still there.
Is there any accessible conversion tool which will create a true 16bit/channel raster image from SVG, including gradients? Preferably for Ubuntu.
EDIT: I attach an example. Instead of Color Curves, I use now another color filter, because it is easier to tell how it was parameterized. The effect is similar, though.
Firstly, I use Inkscape 1.0.1 to export https://svgshare.com/s/TQe as an RGB16 PNG to Gimp 2.10. Then I use the filter Brightness/contrast, where I change the contrast to 0.4. The effect:
Some of the subsequent values of the red component, tested with the color picker: 33.9, 38.9, 41.3, scale 0 ... 100. As seen, the accuracy is not even 8 bit.