Clipping-plane BAD render results

Hi everyone,

I’m encountering an issue with rendering an image using a clipping plane. The problem is that the clipping plane is not allowing light to pass through, resulting in a dark void in the rendered image. I have already excluded some lights from the clipping plane, but the issue persists.

Is this a known bug? Does anyone know a way to achieve the desired result?
@nathanletwory perhaps you know what’s happening?

Thanks in advance for your help!

Left top: raytraced
Right top: Rendered (the effect i want)

Rhino 8 SR8 2024-6-11 (Rhino 8, 8.8.24163.12481, Git hash:master @ ded4d86ca901dbeaf13ee84f79b3e91b22da4880)
License type: Commercial, build 2024-06-11
License details: Cloud Zoo

Windows 11 (10.0.22631 SR0.0) or greater (Physical RAM: 64GB)
.NET 7.0.20

Computer platform: LAPTOP - Plugged in [98% battery remaining]

Hybrid graphics configuration.
Primary display: Intel(R) UHD Graphics (Intel) Memory: 128MB, Driver date: 5-12-2024 (M-D-Y).
> Integrated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
Primary OpenGL: NVIDIA GeForce RTX 3080 Laptop GPU (NVidia) Memory: 16GB, Driver date: 4-11-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 552.22
> Integrated accelerated graphics device with 4 adapter port(s)
- Video pass-through to primary display device

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: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 4-11-2024
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 16 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Karamba\License\Karamba3D_LicensePlugin_Rhino7.rhp “Karamba3DLicense”
C:\Program Files\Enscape\Enscape.Rhino.Plugin-net48\Enscape.Rhino8.Plugin.dll “Enscape.Rhino8.Plugin” 0.0.24138.1238

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.8.24163.12481
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.8.24163.12481
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.8.24163.12481
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.8.24163.12481
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.8.24163.12481
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.8.24163.12481
C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”
test clipping plane light.3dm (92.3 KB)

It is not a bug, it is a feature. This is to allow for instance to do cut aways of say a room and have the lighting still be intact without outside light meddling.

Hi @nathanletwory,

Thank you for your response. I understand the feature, but why are the results different between rendered mode and raytraced mode?

And is there a way to use raytraced mode where the light enters the room without having to physically boolean away everything in front of the clipping plane? Or perhaps any other suggestion?

Thanks a lot

Not at the moment, but for Rhino 9 the work I’m going to be doing should make it possible to control light paths per object and such, giving more control closer to what you can see in Blender Cycles.

1 Like

Put a rectangular light just in front of the clipping plane. Or spot…