Rhino 8 SR32 - ClippingDrawing loses Section Fill when AddBackground=Yes

Rhino Rhino for Windows
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1

Hello,

I believe I have encountered an issue with ClippingDrawing in Rhino 8 SR32.

Rhino Version

  • Rhino 8 SR32 (8.32.26160.13001)
  • Windows 11
  • NVIDIA Quadro P1000
  • Hardware acceleration enabled
  • No third-party plugins

Problem

When creating a ClippingDrawing, I cannot generate both the section fill and the background geometry at the same time.

Case 1



ShowHatch=Yes
ShowSolid=Yes
AddBackground=No

Result:

  • Section fill is generated correctly.
  • Background geometry is not included.

Case 2



ShowHatch=Yes
ShowSolid=Yes
AddBackground=Yes

Result:

  • Background geometry is generated correctly.
  • The section fill disappears completely.
  • Only the section boundary curves remain.

What I have already tested

  • Tested with the original project file.
  • Tested with a simple Box in a new file.
  • Created a new Clipping Plane.
  • Reset the Section Style.
  • Pattern = Solid.
  • Pattern Color = Black.
  • ShowHatch = Yes.
  • ShowSolid = Yes.
  • Tested in Technical, Shaded, and Wireframe display modes.
  • Verified that the Clipping Plane is enabled only in the Perspective viewport.
  • Updated GPU drivers.
  • No third-party plugins are installed.

The behavior remains exactly the same.

Additional Information

The same workflow works correctly in Rhino 8.1, where both the section fill and the background geometry are generated together.

My version is Rhino 8 SR32, and I would like to know whether this is a known regression or a bug introduced in later service releases.

I have attached screenshots and can also upload the 3DM file if needed.

Thank you.

3

Hi Mostafa,
Thanks for the details.

We do need a small 3DM file that will show us the issue. And any screen shots that will show us what you see.
If you have to send a large one, you can upload it here:
In the upload refence the forum link and put attn Mary Fugier.

We also need your Rhino SystemInfo.
Open Rhino and type the command SystemInfo.
Copy and paste the text details into your reply.

Thanks,
Mary Ann Fugier

4

Hi Mary,

Thank you for your reply.

I found the issue, and it turned out to be user error rather than a Rhino bug.

I was accidentally looking at a duplicated version of my model instead of the one that had the offset surfaces for the section. Once I checked the correct model, everything worked as expected.

Thank you for your time and support.

5

Thank you for the update, Mostafa.

Nice work figuring this out.
Let us know if you have any additional issues.

Sincerely,
Mary Ann Fugier