I am experiencing a consistent issue when importing DWG or PDF files into Rhino 8. After import, the curves appear extremely thick on the screen, to the point that the entire viewport looks filled with colors, while the control points remain normal and properly scaled.
I have tried the following without success:
Disabling Line Width and Show Line Widths in Pixels in the Display Modes.
Resetting all Display Modes to defaults multiple times.
Setting Print Width to Hairline for all imported objects.
Importing PDFs with line widths set to minimal values both in Adobe Illustrator (0.25 pt) and Autocad, using “Import Line Widths” both enabled and disabled.
Using different viewport modes (Wireframe, Shaded, Technical) with different viewport settings.
The problem persists regardless of file type (DWG, PDF, DXF) or scaling, which suggests that the issue is internal to Rhino’s interpretation of imported 2D curves, possibly related to Curve Thickness or viewport rendering of imported curves. Even after resetting Display Modes and turning off all line width options, curves continue to display as excessively thick.
This issue prevents proper visualization and manipulation of imported 2D geometry, especially when working with architectural plans or technical drawings.
Could you please advise whether this is a known issue in Rhino 8, and suggest a solution or workaround for properly importing curves without automatic exaggeration of thickness?
Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 16GB)
.NET 8.0.14
Computer platform: DESKTOP
Standard graphics configuration.
Primary display and OpenGL: NVIDIA Quadro K2000 (NVidia) Memory: 2GB, Driver date: 7-22-2015 (M-D-Y). OpenGL Ver: 4.5.0 NVIDIA 353.62
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
GPU Tessellation is: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.5 (primary GPU’s maximum)
Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High
Vendor Name: NVIDIA Corporation
Render version: 4.5
Shading Language: 4.50 NVIDIA
Driver Date: 7-22-2015
Driver Version: 10.18.13.5362
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 2 GB
2 GB is only half the absolute minimum required for Rhino 8. The video driver is 10 years old. If you want to run Rhino 8 on this desktop I think you’ll need to update your video card (and driver).
Frankly I’m surprised that you can accomplish as much with your setup as you apparently are.
