Viewport Border Went Missing

[AndersDeleuran]

Hi McNeelies (maybe @Gijs or @dale),

Just noticed that the frame/border around viewports went missing in the latest beta:

I tried resetting everything a few times to make sure I didn’t accidentally fiddle with an advanced key. But I don’t think I did. See e.g. these screenshots from last weeks build for reference (i.e. where the frame/border was still there).

SystemInfo

Rhino 9 SR0 2026-6-23 (Rhino 9 BETA, 9.0.26174.12303, Git hash:master @ 8cd1747b0e2a5abafffff683b0f00f4bbe7bf2a9)
License type: Commercial, build 2026-06-23
License details: Cloud Zoo
Expires on: 2026-08-07

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 31GB)
.NET 10.0.9

Computer platform: LAPTOP - Plugged in [100% battery remaining]

Hybrid graphics configuration using DirectX
Primary display: NVIDIA RTX PRO 2000 Blackwell Generation Laptop GPU (NVidia) Memory: 8GB, Driver date: 3-4-2026 (M-D-Y).
> Integrated accelerated graphics device with 4 adapter port(s)
- Laptop’s primary display device

Secondary graphics devices.
Intel(R) Arc™ Pro 140T GPU (16GB) (Intel) Memory: 2GB, Driver date: 4-16-2026 (M-D-Y).
> Integrated accelerated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port

DirectX Settings
Safe mode: Off

OpenBLAS: OpenBLAS 0.3.30 DYNAMIC_ARCH NO_AFFINITY Haswell MAX_THREADS=64.

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\Commands.rhp “Commands” 9.0.26174.12303
C:\Program Files\Rhino 9 WIP\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 9 WIP\Plug-ins\3dxRhino.9.rhp “3DxRhino.9”
C:\Program Files\Rhino 9 WIP\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 9 WIP\Plug-ins\UpdatesAndStatistics\UpdatesAndStatistics.rhp “UpdatesAndStatistics” 9.0.26174.12303
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.26174.12303
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.26174.12303
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.26174.12303
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.26174.12303
C:\Program Files\Rhino 9 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 9 WIP\Plug-ins\SectionTools.rhp “SectionTools”

Best and a happy weekend,

Anders

[Japhy]

Hi Anders,

This was intentional, originally submitted by @Gijs

[Gijs (Gijs de Zwart)]

that’s interesting, I thought you would be the first person to be happy with it. Apparently I removed a pixel too many.

That being said, you have a non standard UI without frame color

This change makes the viewports identical to what’s on Mac. Try the default frame and content colors and you can see why I made this change

[Piotr]

I like It! No need to change it back.

[AndersDeleuran]

@Gijs

that’s interesting, I thought you would be the first person to be happy with it.

Hehe, sorry. I do indeed have my preferences

@Gijs

That being said, you have a non standard UI without frame color

I prefer the simpler/flatter GUI design of Rhino 7 with the same subtle 1 pixel border everywhere:

So with Rhino 8 and 9 I’ve tried to “emulate” that as much as possible. Which has worked pretty well for me, till this weeks Rhino 9 Beta update:

@Gijs

Try the default frame and content colors and you can see why I made this change

I’m sorry, but this just looks messy and visually distracting to me:

Would it be possible to at least add an option to get the borders back? Failing that, can you point me to the advanced key that sets the color of the borders between viewports (might work better if I could make that the same as the content/frame color)?

Edit: But other than the issues I’ve reported, the Rhino 9 GUI is looking/working most awesome

[Charles]

I like the reduced style.
Anders is right about the splitter width, for me it looks better like this:

[AndersDeleuran]

@AndersDeleuran

Failing that, can you point me to the advanced key that sets the color of the borders between viewports (might work better if I could make that the same as the content/frame color)?

That would be Rhino.UI.ThemeSettings.Frame.ViewportDivider. And it does indeed help a bit. Still much prefer the thin/crisp/subtle Rhino 7 borders though

[Gijs (Gijs de Zwart)]

I’ll bring the 1px viewport border back as an advanced option if I can make it optional. Note that the change I made removed that pixel but also the extraneous padding on the viewports, which you probably didn’t notice much because of your single color setup for frame and content background.

For the current default colors the viewport borders are worse ( most noticeable in dark mode, especially when using darker viewport backgrounds).

[AndersDeleuran]

Thanks @Gijs, much appreciated. If you can’t make it work, I think this setup could grow on me:

Though the inconsistency with both Grasshoppers is a bit jarring. But I suppose the Rhino 8 GUI design with the frame/content background logic is a break with the preceding designs in general. iI would be nice with a bit more consistency across the board (even if that would be adverse to my preference).

[Gijs (Gijs de Zwart)]

RH-96555 Viewport outer border missing in Rhino 9 BETA since build 9.0.26174

[brian (Brian Gillespie)]

RH-96555 is fixed in Rhino BETA

[AndersDeleuran]

You’re a god damn rockstar @Gijs. Thanks again for adding these back in as an option. Noticed a small bug where these bits are missing when maximized: