If you are seeing grid artifacting in DeNoise AI,
1. Go to your Preferences panel using File -> Preferences for Windows or DeNoise AI -> Preferences for the Mac.
2. Click the "Advanced Preferences" button
3. Set "Enable discrete GPU" to "No"
This will cause the image to process on the CPU instead of the GPU. This will probably make your image process slower but will eliminate the artifacting.
Grid artifacting is known to happen for some images but not all images, so hopefully you will only need this workaround rarely and for a few images while we improve our neural net to address these edge cases.