Created attachment 157596 [details] video of the bug SUMMARY *** If I have a noise layer and I try to do a levels adjustment on it, the preview will shows what looks to be accurate to what it SHOULD do, then the final product is vastly different, its as if its then automatically adding more noise to the image again. I have tried this on noise layers that were then saved as a flat images and imported back into krita (in case there was some weird interaction with the levels adjustment and a filter layer) and it is the same result. *** STEPS TO REPRODUCE 1. Do a levels adjustment on a noise layer OBSERVED RESULT Bright excessive noise -See attached video file EXPECTED RESULT Darker, starfield like image -See attached video file SOFTWARE/OS VERSIONS Windows 10 ADDITIONAL INFORMATION
Please try previewing at 100% zoom. It may be that the filter is applied to the small size zoomed image and gives different results than when it is confirmed and applied to the full size image, all that exagerated by the nature of the noisy image. Not sure.
Yes, I'm pretty sure that this is the case. It's unavoidable, I'm afraid. the only way out is to disable instant preview -- but on an image of this size, it would be wise to also disable filter preview.