sometimes surfaces become transparent after rotating the model. I am attaching a screenshot.
dont use such preformated code boxes for questions, because it makes it extremely difficult to read for others and help.
maybe just using regular text will suffice?
also there is not much one can tell by looking at a picture here, you would have to post your geometry.
@Robert26 This could be a direct3d issue. Pls run _SystemInfo and post back the results. It would be also helpful to share the model. Run Dir on the surfaces. are the normals pointing toward the camera?
Not sure how close are Rhino 8 and Rhino 9 to each other, but I remember that back in 2024 there was some weird bug in Rhino 8 that occur when I imported some of my custom display modes from Rhino 7 to Rhino 8. The bug was related to the shadows and the way the geometry was rendered (either disappear or appear completely white, as if it had a 100% luminosity). You made a modified version of my “Bobi X14” display mode that was adapted for Rhino 8 to work properly. Here is an example:
Original display mode made in Rhino 7:
Bobi X14.ini (13.9 KB)
A modified version to make it compatible with Rhino 8:
Bobi X14 adjusted.ini (15.4 KB)
The environment map used by these display modes:
Crackdown 1.rar (54.6 KB)
Also, note that some display modes exhibit a bug related to the sudden loss of visibility, which means that certain surfaces that are joined to a polysurface suddenly get invisible depending on the camera angle. Very similar to what the author of this topic experiences. This is especially true for semi-transparend display modes. Here is one that you can test with polysurfaces. Works fine in Rhino 7, but looks weird in Rhino 8:
Ghosted V3.rar (302.5 KB)
This does not answer my questions: are these faces pointing to the camera? Can you run _SystemInfo and post back the results?
Is that what it was about?
Rhino 9 SR0 2025-11-11 (Rhino WIP, 9.0.25315.12305, Git hash:master @ 1e0af682280480be14f9f055827960256e775995)
License type: Commercial, build 2025-11-11
License details: Cloud Zoo
Expires on: 2025-12-26
Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 15GB)
.NET 9.0.11
Computer platform: LAPTOP - Plugged in [100% battery remaining]
Hybrid graphics configuration using DirectX
Primary display: NVIDIA GeForce RTX 3050 Ti Laptop GPU (NVidia) Memory: 4GB, Driver date: 3-14-2025 (M-D-Y).
Integrated accelerated graphics device with 1 adapter port(s)
- Laptop’s primary display device
Secondary graphics devices.
AMD Radeon™ Graphics (AMD) Memory: 1GB, Driver date: 8-30-2022 (M-D-Y).
Integrated accelerated graphics device with 5 adapter port(s)
- Secondary monitor is laptop’s integrated screen or built-in port
- Windows Main Display attached to adapter port #1
DirectX Settings
Safe mode: Off
OpenBLAS: OpenBLAS 0.3.29 DYNAMIC_ARCH NO_AFFINITY Zen 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” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 9 WIP\Plug-ins\UpdatesAndStatistics\UpdatesAndStatistics.rhp “UpdatesAndStatistics” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\System\netcore\export_PDF.rhp “PDF Export” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 9.0.25315.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 9 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 9 WIP\Plug-ins\SectionTools.rhp “SectionTools”
C:\Program Files\Rhino 9 WIP\Plug-ins\export_STEP.rhp “STEP Export”
Thanks,
as for the model, you don’t need to share your whole file, if you can just send the surfaces that are not shading correctly, that would work already. Or run the Dir command on those surfaces and show a screenshot of that.
You are using Direct3d which is still under development. In your Options > View > GPU you can see if the problem persists when switching over to OpenGL.
Thanks. Switched to OpenGL and now it is working well.