Rhino 7 running extremely slowly

Wondering if anyone else is having this problem and / or have any solutions.

Rhino has started running extremely slowly to the point where even in wireframe the file is virtually unusable. Also making V Ray unable to render to any kind of decent image size (eg 2000 x 2000).

I have read some Reddit threads suggesting that Rhino is single threaded and CPU locked though this was some time ago (is it even true?) so perhaps there is just a ceiling to the speed at which Rhino can run :frowning:

Can’t make the file significantly smaller - anyone have solutions?

File size and PC spec below.

Current file size:
1.5GB.

PC specs:
32GB DD4 RAM
12th Gen i7-12700
Windows 11

Cheers
Raph

Rhino Reddit is full of children who know so little their “help” seems like deliberate trolling.

Run -systeminfo and post the results.

1.5 GB is a pretty big file, what is it full of?

Do you mean that a particular version that you have been running has suddenly started running slower on the same model? Or have you made changes in the Rhino version, Windows, your model or your hardware that brought the slowdown?

1 Like

It is a topographical site model with several buildings, and v ray scatter geometries, scattering trees (though the number of non-scattered trees is v low), and a few low poly v ray meshes (cars)

Run SystemInfo in Rhino and post the results.

hardware and software have stayed the same. Started running slowly on some files, some much smaller in size than this 1.5GB…

Could the embedded textures in the 1.5GB model be making it run slower than the others? Is there a way to un-embed?

Rhino 7 SR36 2023-12-12 (Rhino 7, 7.36.23346.16351, Git hash:master @ 11a364321297eb8cdb34405a3308d8911f58706d)
License type: Educational, build 2023-12-12
License details: Cloud Zoo

Windows 11 (10.0.22621 SR0.0) or greater (Physical RAM: 32Gb)

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 3060 Ti (NVidia) Memory: 8GB, Driver date: 1-12-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 546.65
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
- Secondary monitor attached to adapter port #1

Secondary graphics devices.
Intel(R) UHD Graphics 770 (Intel) Memory: 1GB, Driver date: 10-29-2023 (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
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: 1-12-2024
Driver Version: 31.0.15.4665
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\RaphaelHaque\AppData\Local\Programs\Enscape\Bin64\Enscape.Rhino7.Plugin.dll “Enscape.Rhino7.Plugin” 0.0.23243.1639
C:\ProgramData\McNeel\Rhinoceros\7.0\Plug-ins\Datasmith Rhino Exporter (d1fdc795-b334-4933-b680-088119cdc6bb)\DatasmithRhino7.rhp “Datasmith Exporter” 5.1.1.0
C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\V7\VRayForRhino.rhp “V-Ray for Rhino”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RPC.rhp “RPC”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.36.23346.16351
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” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”

What is the PolygonCount of the model.

Embedded textures shouldn’t matter, no.

The main thing really seems to be the number of objects, are there hundreds of thousands?

What if there were 10.7 million :laughing:

10.7 million polygons isn’t a big deal, though I think your video card might struggle, 8GB VRAM is not a lot.

10.7 million “objects”–a curve, a point, a single mesh–IS.

This is the result of running that command:

Command: PolygonCount
Select objects
There are 566,542 quadrilateral polygons and 9,578,854 triangular polygons in this model
There would be 10,711,938 total triangular polygons in this model after forced triangulation

How do I find out no. of objects?

Ctrl+A

Oh yeah of course lol cheers

1 Directional light, 10 Point lights, 2797 block instances, 120 points, 11 text dots, 2634 curves, 471 surfaces, 912 polysurfaces, 809 extrusions, 141 meshes, 40 texts, 1 SubD, 10 hatches added to selection.

This is pretty fine right?

Some of this might depend on your block instances. Rhino does have a problem with display speed of nested block instances. If you do a SelBlock and hide the instances, does the display get significantly faster? Another thing that might slow down the display is if you have curves with very fine linetypes.

I could delete all the curves actually (would hiding them have the same effect)

nested block instances

meaning blocks within blocks?

Yes.

There aren’t any blocks within blocks and I need all 3000 blocks…

What do you recommend?

We’re just trying to test what the issue might be, hide 'em…

Ok I have turned them off, that has made the display much faster. What’s the next step? Thanks for all the help so far guys

V Ray is still running very slowly though whether this is caused by this Rhino issue, I don’t know - do either of you have any ideas?