Strange grey lines when zooming in Rhino 8 rendered mode

Rhino Rhino for Windows
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1

Hello
When I zoom in rendered mode on my rhino perspective view some grey stranges lines appears.
I think it is maybe link to the surveyor cad import I have done but I don’t know… That is not a big issue for me but I wanted to share the “bug”. I cant import the file because it weight 40mb so I post a picture.
Thank for your time, have a nice day

image
image1301×744 233 KB

2

Hi Victor -

I’m afraid that image doesn’t tell me anything.
Do you also get these lines when you start a new file and create a few curves?
-wim

3

Hello, no at all with a fresh file, it appears when I import my dwg from the surveyor. I could send you the file if you want but it is a 40mb file.

4

Hi Victor -

If it’s still too big after you zip it, you can use Rhino Accounts to send it to us. In that case, please copy a link to this topic in the comments field on that page.
-wim