Display of lines are too thin

Hello there!

I am launching Rhino 7 for the first time on my Windows PC and all drawn lines as well as the yellow selection frame around objects get only visible if I zoom in quite a lot. Is there a way to increase the thickness of all lines in my Rhino interface?

Thank you very much for your help!

Hi Kilian - can you please run SystemInfo in Rhino and copy/paste the results here? Maybe post a screen grab of a viewport as well. (Select your objects, Ctrl-C and paste in your message back.)

Like so:


Dear Pascal,

Thank you for your quick reply!

Here you can see the SystemInfo:

Rhino 7 SR28 2023-2-27 (Rhino 7, 7.28.23058.03001, Git hash:master @ 4ffc5d7156fbccf2a5d9fcc80e522b3851bc7f6c)
License type: Studentenlizenz, build 2023-02-27
License details: Cloud Zoo

Windows 10 (10.0.19044 SR0.0) or greater (Physical RAM: 24Gb)

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: Radeon RX 580 Series (AMD) Memory: 8GB, Driver date: 2-17-2023 (M-D-Y). OpenGL Ver: 4.6.0 Compatibility Profile Context
> Accelerated graphics device with 7 adapter port(s)
- Windows Main Display attached to adapter port #0

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: ATI Technologies Inc.
Render version: 4.6
Shading Language: 4.60
Driver Date: 2-17-2023
Driver Version: 31.0.14033.1012
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 20190 MB

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.28.23058.3001
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.28.23058.3001
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.28.23058.3001
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.28.23058.3001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.28.23058.3001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 7\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 7\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 7\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 7\Plug-ins\Alerter.rhp “Alerter”

The following screenshots show the invisible lines on a normal zoom and the same lines visible on a high zoom. One line is from the selection of an imported plan and the other line is from a simple cuboid in the wireframe display.

Selection frame:

Wireframe cuboid:

OpenGL: Radeon RX 580 Series (AMD)

Hi Killian- please open Options > View > OpenGL page and in there move the slider one or two notches to the left. (The Radeon drivers are problematic in Rhino and so you need to pull back that setting)


Dear Pascal,

Thanks for your help! Unfortunately I still have the same problem. Now the points at the edges of polylines are visible but the lines in between are still too thin. Also the selection frame did not change in thickness at all.


Selection frame:

Hi Killian - Un-check ‘GPU Tessellation’ in the same dialog - any better?


Dear Pascal,

Yes, Un-checking GPU Tessellation did connect the dots with lines but now the dots themselves are invisible once I check ‘Print Preview’:

The lines seem connect correctly once turning ‘Print Preview’ off but I’d prefer to work with this setting enabled since it provides me with better visibility and lets me distinguish different lines easier.

Hi Killian - with ‘GPU Tessellation’ off, can you try increasing the slider again, if you have not?


Dear Pascal,

After restarting Rhino the problem has been solved! I kept the following settings:

The only problem I have left now is that the lines of 3D objects seem to be displayed in a low resolution making their edges quite jagged, is this a consequence I have to live with or is there a solution as well?

Hi Killian - you can try turning up the Anti-Aliasing on that page to 8x if that is available, but I am not sure it will help a lot.
@Kilian a developer here suggests running the OpenGL slider up to 3.3 and see if that looks better.


Dear Pascal,

Yes, it did work! Thank you so much for setting me up to start to learn Rhino, I would have not been able to solve this on my own!


Hi Killian- you are welcome - I am glad you have it sorted out, and no, there is no really good way to work around the driver issues we’ve been seeing without some hand-holding.


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