Dear developers, here’s a file with two mesh parts I client created / modified in Blender.
The two meshes don’t boolean union in Rhino 8 WIP but do so instantly in Rhino 7.
two_meshes_that_do_not_boolean_union_in_rhino_8_wip.3dm (515.1 KB)
Thanks for your reply @John_Brock I tried this yesterday with the latest build and today again after updating and it does not work. I used MeshBooleanUnion.
My System Info
Rhino 8 SR0 2023-2-21 (Rhino WIP, 8.0.23052.12305, Git hash:master @ b52fe2b2d76e3a7ba202e3773b511edc5c148c93)
License type: Kommerziell, build 2023-02-21
License details: Cloud Zoo
Expires on: 2023-04-07
Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 1.3e+02Gb)
Computer platform: DESKTOP
Standard graphics configuration.
Primary display and OpenGL: NVIDIA RTX A5000 (NVidia) Memory: 22GB, Driver date: 2-2-2023 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 528.49
> Accelerated graphics device with 4 adapter port(s)
- Secondary monitor attached to adapter port #0
- Windows Main Display attached to adapter port #1
Secondary graphics devices.
NVIDIA Quadro K2200 (NVidia) Memory: 4GB, Driver date: 2-2-2023 (M-D-Y).
> Accelerated graphics device with 4 adapter port(s)
- Secondary monitor 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: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 2-2-2023
Driver Version: 31.0.15.2849
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 23028 MB
Rhino plugins that do not ship with Rhino
C:\Users\martinsiegrist\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\EleFront\4.2.2\ElefrontProperties.rhp “ElefrontProperties” 1.0.0.0
C:\Users\martinsiegrist\AppData\Roaming\McNeel\Rhinoceros\8.0\Plug-ins\KeyShot9RhinoPlugin (ecfe8d1f-876a-460f-aa5e-3dd816936811)\1.4.0.0\KeyShot9RhinoPlugin\Rhino 7\KeyShot9RhinoPlugin.rhp “KeyShot9RhinoPlugin” 1.4.0.0
Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8 WIP\Plug-ins\Commands.rhp “Commands” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 8 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoRoslyn.rhp “RhinoRoslyn” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\SectionTools.rhp “SectionTools”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCodePlugin.rhp “RhinoCodePlugin” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCPython.rhp “RhinoCPython” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.0.23052.12305
C:\Program Files\Rhino 8 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8 WIP\Plug-ins\ConstraintsUI.rhp “Constraints UI” 8.0.23052.12305
It doesn’t look like you’re actually running the command.
- Start the command
- Select both meshes
- Press Enter
Interesting…
I just updated to a newer WIP and it fails for me now too.
I’ll get it on the pile.
Thanks 
I’ve isolated when the change went into the WIP that broke this case, and added a defect report for the developer.
Thanks for the report and sample file.