had a user point out some jaggy lines in my viewport renderer; didn’t see how that could happen so I looked into it a bit, and found the same occurring with cycles: [image] [image] rhino-viewport-jaggy.3dm (3.1 MB) this may be sensitive to viewport resolution, in this case the resolution is 17…

appears fixed in 8.0.23264.9003, 2023-09-21 [image] RH8 Beta Raytraced display mode shifty BUG Serengeti (Rhino 8 BETA) RH-77157 is fixed in the latest BETA