Surfaces displayed as flipped when blocks are rotated

Rhino Rhino for Windows
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1

Hi all,
As in the title, when I rotate or mirror any block, the surfaces (closed or open) inside that block, are displayed as flipped. I have backfaces colored as red to see it better. It looks fine in Arctic though. Could it be OpenGL issue, or some other bug?

image
image1678×1052 61.1 KB

sample block bug.3dm (185.3 KB)

Best,
Jan

2

Hi Jan,

Pleas run SystemInfo in your Rhino command line and post the result.

I’m not seeing the behavior in 8.20

3

Hi Japhy, here’s the SystemInfo log as a .txt. Thank you!
250430_Rhino8BugLogSystemInfo.txt (2.9 KB)

4

I believe the issue you are seeing was fixed in 8.18.

5

Yes! After updating to 8.19 the issue is solved. For some reason my Rhino did not update automatically. Thank you!