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About rschaub

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  • Birthday 08/25/1981

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  1. I just encountered the same bug. A newly created document, saved it under a new name (which worked). For a while, i was able to work and save changes just fine. Then suddenly this error started to appear no matter what I tried. So I reloaded the document (lost a few minutes of work but no biggie), after which ctrl+s seemed to work (no error message), so I kept working. about three hours later, when I tried to close Affinity, the error reappeared. so I tried the same thing as before (reload te document), but to my surprise the document was the three hour old version. None of the intermediate saves worked, and the whole artwork is now lost. I must say that I'm getting increasingly disappointed with this software, but now that I can't even be sure that my work gets saved properly, I'm out.
  2. Unfortunately, this trick only worked to smoothen the gradient somewhat, but not eliminate noise competely. In the meantime, I found out that disabling gradient dithering under performance options only has a visual impact on "object layers" (e.g. a rectangle with a gradient fill). Applying a gradient to a pixel layer (using the gradient tool) introduces dithering even with the disabled gradient dithering option. It seems the 'error' is introduced when rasterizing gradients: Adding a rectangle and filling it with a smooth gradient, then rasterizing the layer immediately makes the noise visible. This is probably what's happening when exporting an image to PNG: rasterize all layers, combine layers then export.
  3. I'll try that, thanks! (In the meantime, I tried adding a gaussian blur adjustment layer on top of all the gradient layers, but somehow, when exporting to PNG, the noise seems to get applied after the blurring. I ended up reimporting the exported image and applying a gauss blur manually. This effectively removes the noise, but with this workflow, I can't benefit from the IMO awesome feature of "export continuously" when altering the gradients.)
  4. I've tried to create a smooth gradient which - after discovering that dithering is a 'performance' option in the settings and disabling it - looks OK in Affinity Photo. However, exporting the image (apparenly no matter what format) re-introduces the noise and my gradient is once again not smooth: (left: magnification of the gradient as displayed in Affinity Photo. right: magnification of the exported png image) Not being able to completely disable dithering is imho either a bug or a terrible oversight. another thing that seems dodgy about gradients is that sometimes changes to positions or midpoints of pivots don't get saved but reset to their previous setting when saving or switching to another layer. The way gradients work in Affinity Photo's current version is pretty much unusable for me, which forces me to go back to GIMP for this task :(
  5. To answer my own question: The problem with visible dithering in theoretically smooth gradients lie with the application's performance settings. Edit -> Performance -> Dither gradients Unchecking this option will make gradients perfectly smooth :D . Having the option checked will result in the above mentioned behavior.
  6. Sorry to open an old topic, but I ran into the exact same problem as OP in Affinity Photo. I'm creating a new pixel layer (256x256) and place a rectangle across the whole layer, which I fill with a gradient (linear, black to white, 256 greyscales, which should theoretically result in one step up in lightness per row). I too noticed considerable noise instead of a smooth gradient. Then I found the slider 'noise' in the gradient color picker. It is set all the way to the left, which should disable any noise. Moving it to the far right will increase the amount of noise in the gradient which is to be expected. However, moving the slider only slightly to the right from its leftmost position will decrease the noise to a barely visible level (it will not disappear completely!). I'm pretty sure that's not the intended behavior... One could argue that if it's barely visible, it's no big deal, but I need a perfectly smooth gradient because I'm using it as a lookup table of sorts for a program I'm writing. Having discontinuities appear in the image will render it useless. left: default settings (magnified gradient) right: noise slider moved slightly. Noise is reduced but still visible. Is there a known workaround to this? Thanks!
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