SaveScreenshot Rendering Artifacts

I am using ParaView 5.9.1 to generate this image, and I have noticed some strange rendering artifacts in the image that is output.
test.tiff (288.1 KB)

My laptop screen has a maximum resolution of 1920x1080. I am able to save the images with this resolution, but if you zoom in close, you will notice horizontal and vertical grid lines running across the image. See the zoomed in image below.
test_cropped.tif (156.3 KB)

Are there any known issues with saving a screenshot at the same or larger resolution than my screen resolution?


Please provides steps to reproduce

It appears to only be an issue when using the Ray Tracing option.

  1. Create the box
    • Sources → Geometric Shapes → Box
  2. Enable Ray Tracing
    • Check “Enable Ray Tracing”
    • Use OSPRay Raycaster backend
    • Change “Samples Per Pixel” to 10
    • Keep all other default settings
  3. Save Screenshot
    • File → Save Screenshot
    • Save in TIF image format
    • Set image resolution to (3840 x 2160)
    • Keep all other default settings

Known issues, no choice but desabling the denoiser:

FYI @timothee.chabat @Dave_DeMarle