Display and captured image sequence gradually degrades

Hello,
I am generating a sequence of images for animation using Grasshopper. Somehow the images gradually degrade / break up after about 80~150 frame. There are several ways this can happen:

In Rendered view or Shaded view, if I turn on surface edge, the images will degrade by showing more and more edges that should be invisible like below.
image

If I turn off surface edge and turn on shadow, the image will degrade by showing more and more horizontal banding pattern. The pattern is mostly horizontal to the image, but it appears to interact with geometry as well. Eventually the image will become scrambled.
image

I tried different ways to capture the images, including animating sliders, using Ladybug’s Capture View component, and the script in this post: Capturing Rhino layout/viewport iterations - print or image export - Grasshopper - McNeel Forum
This issue persists.

Some experiments:

  • I also tried to put the script component on top on GH canvas and it doesn’t help.
  • This issue also appears in Rhino 6.
  • Another person with a different computer and monitor also saw this issue using the same script.
  • The captured image size is 1920x1080.
  • If I set the view to the same display setting as the image, I can see the same issue in the view if it refreshes with the image capture.

Has anyone seen this before? Any solutions?

Best,
Peng

Hi Peng -

Can you post a file with instructions on how to reproduce that issue?
Also, please run the Rhino SystemInfo command and copy-paste the result here.
-wim