The brep does not show the material

The brep has been given a material,but it does not show.And when I click the brep ,it shows.

Hi -
Please run the Rhino SystemInfo command and copy-paste the result here.
Could you share that 3dm file?

Rhino 7 SR24 2022-11-4 (Rhino 7, 7.24.22308.15001, Git hash:master @ cb2ad12922ceb989b185972675bb705a00abb97d)
License type: Corporate, 版本2022-11-04
License details: Stand-Alone

Windows 11 (10.0.22621 SR0.0) or greater (Physical RAM: 16Gb)

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2060 (NVidia) Memory: 6GB, Driver date: 4-15-2022 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 512.52
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
- Secondary monitor attached to adapter port #1

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: 4-15-2022
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 6 GB

Rhino plugins that do not ship with Rhino
E:\项目\\src\Clients\Louge.RhinoApp\Plugins\Louge.Plugin.Architecture\bin\Debug\net48\Louge.Plugin.Architecture.rhp “Louge.Plugin.Architecture”
C:\Users\duzhengjie\AppData\Roaming\McNeel\Rhinoceros\7.0\Plug-ins\pOd_Rhino (39fcf1e5-6caf-4d83-bfad-f88820e13131)\2020.9.15.1\pOd_Rhino_2020.09.15.1.rhp “pOd_Rhino” 2020.9.15.1
C:\Users\duzhengjie\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\EleFront\4.2.2\ElefrontProperties.rhp “ElefrontProperties”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.24.22308.15001
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.24.22308.15001
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.24.22308.15001
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” 7.24.22308.15001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.24.22308.15001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”

brep_material.3dm (730.4 KB)

Cracked versions we don’t support. The binary has likely been modified such that it is not performing as it was designed.

That said, your problem is that you have co-incident surfaces grouped. Ungroup them and delete the closed polysurfaces that have no material assigned.