After reporting this issue to Topaz Labs, I was referred to this post (https://community.topazlabs.com/t/known-issue-square-grid-artifacts-click-here-if-you-get-this/85859), which doesnât seem to pertain to my issue as it is not âsquare grid artifactâ.
Attached is my System Profile:
Sequoia 15.2
And here is what the problem looks like . . . It is actually THREE problems that have repeatedly shown up with this file
(1) a faint mottling of blue on blue in the sky (upper right of over pic below)
(2) a repeated pattern in the noise/grain of the sky that forms diagonal bans more visible with increased zoom;
(3) distinct âpin holeâ white spots in the sky, which only shown up in full sized versions
Each of the above are screen shots from the DNG from Topaz that was added to Lightroom.
Note: these patterns have ONLY shown on files processed through Topaz. NOT through ON1, DxO, OM Workspace or Lightroom. The reason I know is because I am about to release a systematic test of these raw file processors in the next week or so. It would be great to hear from you prior to publication.
Thanks,
Terry McDonald
www.luxBorealis.com
Original Photo (downsized to 1500px)
Original Post:
I am getting TWO odd repeated artefact patterns:
(1) One is almost like small chevrons in smooth blue sky areas at just above the pixel level, producing repeated diagonal lines across the sky;
(2) The second pattern is a much larger non-repeating artefact of weak vertical and horizontal bars, almost like a window frame with mottling inside. These occur in a different part of the same plain blue sky, in the same photo.
I have put the ORF file through RawDenoise (Normal) + Sharpen (Standard) actions several times. Both patterns appear in each iteration, but the âwindow frameâ bars appear differently each time.
Interestingly, neither pattern is visible in the âOriginalâ view of the Topaz-created DNG in Lightroom. They only show when masks and processing are applied (to deepen the blue of the sky). These same masks are also applied to the original ORF in Lightroom and DO NOT show any artefact patterns in the sky.
I wish I could include screen shots of what I am seeing, because the window frame + mottling is visible without zooming. The âchevronsâ appear at 200% and the overall diagonal pattern they create is visible at 100%
Steps to reproduce issue:
- Export âOriginalâ from Lightroom (Cloud-based) to a dedicated folder.
2.Open ORF in Topaz Photo AI
- Raw Demoise (Normal) and Sharpening (Standard) are applied.
- Export to same folder as DNG.
- Add to Lightroom (Cloud-based).
- Apply âLightâ, âColourâ, and âMasksâ processing to the DNG (but not âDetailâ)