Slow performance in material editor

[Piotr]

@Gijs

Most of the bugs you are seeing currently in Rhino 8 are rooted in rewriting the UI.

I don’t care about UI. I have set it up to be close to V7 and I use custom shortcuts mostly.
V8 is terribly slow compared to V7 and, knowing I have to be learning it, I don’t have the patience and I can’t afford wasting my time. With each V8 session it takes 30 min or so before I go back to V7.
Anything related rendering is absolutely no-go zone (materials, environment, mapping etc) and it’s pity because I like the new push-pull and some new additions.
I keep explaining myself that reason is below the keyboard (literally) but I can’t afford the machine that would be significantly faster than the one I am having. So, some of the V8 problems may be related to the faster computation demand.

[Gijs (Gijs de Zwart)]

hi @Piotr, to start with: what’s your _SystemInfo?
If you can quantify any of the statements it might help to make things better. Things like ‘terribly slow’ or ‘absolutely no-go zone’ doesn’t give much information on what is happening at your end.

[Piotr]

In my world ‘terribly slow’ means more than 10 sec. and this is how much it takes to load, edit or remove materials from panel, Same for environments.
Very often, after manipulations of such kind, the overall performance drops significantly and there is no, or delayed response from my 3d mouse. No such things in V7.
It looks like V7 is better optimised for older machines like mine:

---

Rhino 8 SR6 2024-3-26 (Rhino 8, 8.6.24086.11001, Git hash:master @ 8e3b686f596bb6443e56e6dbecf0f54f4888713a)
License type: Commercial, build 2024-03-26
License details: Cloud Zoo

Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 16GB)
.NET 7.0.0

Computer platform: LAPTOP - Plugged in [95% battery remaining]

Non-hybrid graphics configuration.
Primary display and OpenGL: Radeon Pro 560X (AMD) Memory: 4GB, Driver date: 7-28-2023 (M-D-Y). OpenGL Ver: 4.6.14761 Compatibility Profile Context FireGL 21.30.45.18 30.0.13045.18005
> Integrated accelerated graphics device with 6 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
Primary OpenGL: Radeon Pro 560X (AMD) Memory: 4GB, Driver date: 7-28-2023 (M-D-Y). OpenGL Ver: 4.6.14761 Compatibility Profile Context FireGL 21.30.45.18 30.0.13045.18005
> Integrated accelerated graphics device with 6 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port

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: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: ATI Technologies Inc.
Render version: 4.6
Shading Language: 4.60
Driver Date: 7-28-2023
Driver Version: 30.0.13045.18005
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 4 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Cyberstrak\R7\CS_ModelingPlugIn.rhp “Cyberstrak Modeling PlugIn”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.6.24086.11001
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”

[anon (am)]

Thanks for the post. I find myself experiencing the same thing with the no-go zones you mentioned, giving up and going back to R7. In addition to the bugs, most actions seem slower in R8 for me except for the shaded viewport display, which is super fast.

I’ve reasoned that I’ll need to buy a new computer in order to use R8, and so far it wouldn’t be for much benefit. I hope that’s not true but I’m afraid it might be.

SystemInfo-R7

Rhino 7 SR37 2024-1-4 (Rhino 7, 7.37.24004.15001, Git hash:master @ e428f0ecb09d755f844c48e5098aba5f8baf55fa)
License type: Commercial, build 2024-01-04
License details: Cloud Zoo

Windows 10 (10.0.17134 SR0.0) or greater (Physical RAM: 16Gb)

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

Non-hybrid graphics configuration.
Primary display and OpenGL: NVIDIA Quadro P2000 with Max-Q Design (NVidia) Memory: 4GB, Driver date: 2-15-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 551.61
> Integrated accelerated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port

Secondary graphics devices.
Intel(R) UHD Graphics P630 (Intel) Memory: 1GB, Driver date: 2-18-2021 (M-D-Y).
> Integrated graphics device with 3 adapter port(s)
- There are no monitors attached to this device. Laptop lid is probably closed

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: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 2-15-2024
Driver Version: 31.0.15.5161
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 4 GB

Rhino plugins that do not ship with Rhino
C:\Users*\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\ColorPicker\6.0.0\ColorPicker.rhp “ColorPicker”
Z:\Shared\Library\Software\Rhinoceros\Others\LayerRenameTools.rhp “Rhino.NET SDK” 0.0.0.0
C:\Users*\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\NVIDIADenoiser\0.4.3\NVIDIADenoiser.Windows.rhp “NVIDIADenoiser.Windows” 0.4.3.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.37.24004.15001
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.37.24004.15001
C:\Program Files\Rhino 7\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.37.24004.15001
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\IronPython\RhinoDLR_Python.rhp “IronPython” 7.37.24004.15001
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.37.24004.15001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.37.24004.15001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
C:\Users\Armen\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\SectionTools\2021.4.30.511\SectionTools.rhp “SectionTools”

SystemInfo-R8

Rhino 8 SR6 2024-3-26 (Rhino 8, 8.6.24086.11001, Git hash:master @ 8e3b686f596bb6443e56e6dbecf0f54f4888713a)
License type: Commercial, build 2024-03-26
License details: Cloud Zoo

Windows 10 (10.0.17134 SR0.0) or greater (Physical RAM: 16GB)
.NET 7.0.0

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

Non-hybrid graphics configuration.
Primary display and OpenGL: NVIDIA Quadro P2000 with Max-Q Design (NVidia) Memory: 4GB, Driver date: 2-15-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 551.61
> Integrated accelerated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
Primary OpenGL: NVIDIA Quadro P2000 with Max-Q Design (NVidia) Memory: 4GB, Driver date: 2-15-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 551.61
> Integrated accelerated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port

Secondary graphics devices.
Intel(R) UHD Graphics P630 (Intel) Memory: 1GB, Driver date: 2-18-2021 (M-D-Y).
> Integrated graphics device with 3 adapter port(s)
- There are no monitors attached to this device. Laptop lid is probably closed

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: 2-15-2024
Driver Version: 31.0.15.5161
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 4 GB

Rhino plugins that do not ship with Rhino
Z:\Shared\Library\Software\Rhinoceros\Others\LayerRenameTools.rhp “Rhino.NET SDK” 0.0.0.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 8\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.6.24086.11001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.6.24086.11001
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”

[Gijs (Gijs de Zwart)]

@Piotr how does this page look at your end in options>rendering?

[Jan_Holger (Jan Kronsbein)]

I have the same problem since Rhino8. Material editor is much slower then in Rhino 7 or older…

Rhino 8 SR6 2024-3-19 (Rhino 8, 8.6.24079.11001, Git hash:master @ 0d13b06881495403bd28e1cee93f8c8ea0baec7c)
License type: Kommerziell, Build 2024-03-19
License details: Cloud Zoo

Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 64GB)
.NET 7.0.16

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA Quadro RTX 4000 (NVidia) Memory: 8GB, Driver date: 1-18-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 551.23

Accelerated graphics device with 4 adapter port(s)

• Secondary monitor attached to adapter port #0
• Windows Main Display 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: 1-18-2024
Driver Version: 31.0.15.5123
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8 GB

Rhino plugins that do not ship with Rhino
C:\Users\j.kronsbein\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\NVIDIADenoiser\0.4.3\NVIDIADenoiser.Windows.rhp “NVIDIADenoiser.Windows” 0.4.3.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.6.24079.11001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.6.24079.11001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.6.24079.11001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.6.24079.11001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.6.24079.11001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.6.24079.11001
C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”

[Piotr]

V8

V7

[nathanletwory (Nathan 'jesterKing' Letwory)]

You might want to make two changes for now to regain a bit more performance while we look into this:

1. Nudge the sharpness slider one or two notches to the left from pixel perfect. This setting affects both previews and Raytraced.
2. In Tools > Options > Advanced search for PreviewSamples and set it to something lower, say 10. This setting affects only previews.

[Piotr]

Done that. I will write later about my experience.
Edit:
It is still slow. To display the material palette takes ca. 2min!
Windows hourglass can spinn for up to 20-30 sec. after leaving material panel.

[ogrenci3_3dsmax]

lol it takes 5 min. how possible to close preview?

[maxsoder (Max Söderström)]

In v8.9 one can turn off the thumbnails by setting EnableGLPreview and EnablePreview to false in Advanced settings and restarting Rhino.

EnablePreview is for rendered previews and EnableGLPreview is for the initial quick preview. Maybe try to turn off the rendered previews first and see if that helps. Also one can try to turn off both and see if that helps performance.

[aidan.newsome]

Please fix this issue. It’s so painful. None of your suggestions work.

[Gijs (Gijs de Zwart)]

hi @aidan.newsome
can you run _SystemInfo in Rhino and post back the results?

@aidan.newsome

Please fix this issue. It’s so painful. None of your suggestions work.

Are you saying that disabling Rendered previews or OpenGL preview have no noticeable effect on performance?

[aidan.newsome]

Rhino 8 SR13 2024-11-12 (Rhino 8, 8.13.24317.13001, Git hash:master @ ca3666c3ebed2b9567e10930077bfa0884f65db9)
License type: Commercial, build 2024-11-12
License details: Cloud Zoo

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

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA Quadro RTX 5000 (NVidia) Memory: 16GB, Driver date: 4-11-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 552.22
> 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
GPU Tessellation is: 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: 31.0.15.5222
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\Chaos Group\V-Ray\V-Ray for Rhinoceros\V7\VRayForRhino.rhp “V-Ray for Rhino”
C:\ProgramData\McNeel\Rhinoceros\8.0\Plug-ins\Datasmith Rhino Exporter (d1fdc795-b334-4933-b680-088119cdc6bb)\DatasmithRhino8.rhp “Datasmith Exporter” 5.4.0.0
C:\Users\Aidan\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\NVIDIADenoiser\0.4.3\NVIDIADenoiser.Windows.rhp “NVIDIADenoiser.Windows” 0.4.3.0
C:\Users\Aidan\AppData\Roaming\McNeel\Rhinoceros\8.0\Plug-ins\SpeckleRhino2 (8dd5f30b-a13d-4a24-abdc-3e05c8c87143)\SpeckleConnectorRhino.rhp “SpeckleConnectorRhino” 2.20.0.16185
C:\Users\Aidan\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\LookXRender\1.0.1\LookXRender.rhp “LookXRender” 1.0.1.0
C:\Users\Aidan\AppData\Roaming\McNeel\Rhinoceros\BlockEditNew\BlockEditNew_V8.rhp “BlockEdit” 1.0.0.0

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.13.24317.13001
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”

[aidan.newsome]

Yeah, for me they have zero noticeable effect on performance. Thanks, Gijs.

[Gijs (Gijs de Zwart)]

hi @aidan.newsome To make sure there is no influence of third party applications when investigating this issue, could you disable all of them and see if the issue persists?
Additionally, if you can send a model that shows the performance issue, we can have a closer look to try and find the bottleneck.
Large and/ or confidential models can be uploaded here.

[Iyang_Huang (Ian Hwang)]

yes please fix the material previews in the material tab. I can see each of my material thumbnail trying very hard to render in cycles. This is making texture heavy files almost unusable.

The Rhino 7 material tab is much faster.

[Elias_Brulin]

Same problem here. When dealing with larger files with lots of materials the material tab with its previews buffering makes the file almost unusable in R8.

Rhino 8 SR13 2024-11-12 (Rhino 8, 8.13.24317.13001, Git hash:master @ ca3666c3ebed2b9567e10930077bfa0884f65db9)
License type: Commercial, build 2024-11-12
License details: Cloud Zoo

Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 96GB)
.NET 7.0.20

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 4080 SUPER (NVidia) Memory: 16GB, Driver date: 10-15-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 566.03
> Accelerated graphics device with 4 adapter port(s)
- Secondary monitor attached to adapter port #0
- Secondary monitor attached to adapter port #1
- Windows Main Display attached to adapter port #2

Secondary graphics devices.
Intel(R) UHD Graphics 770 (Intel) Memory: 2GB, Driver date: 10-25-2024 (M-D-Y).
> Integrated graphics device with 4 adapter port(s)
- There are no monitors attached to this device!

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
GPU Tessellation is: 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: 10-15-2024
Driver Version: 32.0.15.6603
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 16376 MB

Rhino plugins that do not ship with Rhino
C:\Program Files\Enscape\Enscape.Rhino.Plugin-net48\Enscape.Rhino8.Plugin.dll “Enscape.Rhino8.Plugin” 4.2.0.1589
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V8\VRayForRhino.rhp “V-Ray for Rhino”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoBonusTools.rhp “Rhino Bonus Tools”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.13.24317.13001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.13.24317.13001
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”

[Elias_Brulin]

The CPU goes through the roof just by opening the material tab

[wim (Wim Dekeyser)]

Hi Elias -

@Elias_Brulin

When dealing with larger files with lots of materials the material tab with its previews buffering makes the file almost unusable in R8.

See this post:

Material Dialogue and List

Thank you for the test model. I tested with the following combination. EnableGL = True EnablePreview = True EnablePreviewCache = False And now I can also see a lag when opening the dropdown. When the Cache is set to false, then we do not cache the previews and they get always regenerated. Can you make one more test for me. How does the dropdown work when both of these are set to false and then restart Rhino? EnableGL = False EnablePreview = False.

Also, please post a screenshot of the material editor.
-wim