BUG WIP 8: Adjustable Curve Blend


The Alt modifier to change the angle between the shape curve and the surface edge in the adjustable curve blend tool does not appear to be working in the latest build.

hi @benjamin.moulton I cannot seem to repeat that issue here. Can you send me your _SystemInfo?

Sure thing. I’ve been looking through my preferences to see if I set something that my conflict with it. I have rotate around cursor user object set to true. I’m going to set all prefs back to default and see if that fixes it.

Rhino 8 SR0 2023-5-30 (Rhino WIP, 8.0.23150.10305, Git hash:master @ a7f16b00e39d903cb1a0d15887ca9d9d8eec1492)
License type: Commercial, build 2023-05-30
License details: LAN Zoo Network Node
Expires on: 2023-07-14

Windows 10 (10.0.19044 SR0.0) or greater (Physical RAM: 1.3e+02Gb)

Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA Quadro RTX 5000 (NVidia) Memory: 15GB, 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 monitor attached to adapter port #2

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:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 15 GB

Rhino plugins that do not ship with Rhino
C:\Users\cz7b38\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\rhino-render-next\0.0.2\RhinoRenderNext.rhp “Rhino Render Next”
C:\Users\cz7b38\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\SubstanceImporter\2.0.3\Substance.Win.rhp “SubstanceImporter”
C:\Users\cz7b38\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\Grasshopper2\2.0.8548-wip.23709\Grasshopper2Plugin.rhp “Grasshopper2” 2.0.8548.23709
C:\Users\cz7b38\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\NVIDIADenoiser\0.4.3\NVIDIADenoiser.Windows.rhp “NVIDIADenoiser.Windows”
C:\Users\cz7b38\AppData\Roaming\McNeel\Rhinoceros\packages\8.0\rhinopbrmaterial\1.1.4+v6.16\RhinoPbrMaterial.rhp “RhinoPbrMaterial”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8 WIP\Plug-ins\Commands.rhp “Commands” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 8 WIP\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.0.23150.10305
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\SectionTools.rhp “SectionTools”
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoRoslyn.rhp “RhinoRoslyn” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\ConstraintsUI.rhp “Constraints UI” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCodePlugin.rhp “RhinoCodePlugin” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\RhinoCode\RhinoCPython.rhp “RhinoCPython” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.0.23150.10305
C:\Program Files\Rhino 8 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8 WIP\Plug-ins\Displacement.rhp “Displacement”

Does it happen in safe mode? If not than you might try disabling the plugins that don’t ship with Rhino to see if that has an effect.

Just so I’m understanding correctly, the Adjustable Curve Blend command should behave the same way that the blend surface tool does when moving the control handle holding ALT, correct? or am I misunderstanding the curve blend command?

This is the behavior I was expecting:

P.S. I tried it in both regular and safe mode in ver 7 and 8

you can only do that when blending more or less perpendicular to the edge, I thought that was what you were showing in the first image

1 Like

I know it has been asked for a couple of times, but forgive me for spamming this request again in here: can we PLEASE have numeric input/sliders for curve blend?

that request is listed as RH-33682 UI for numeric entry in BlendCrv as in BlendSrf

I’ve added your request to it

Yeah, I know. Listed for a couple of years…
It can’t be that difficult, I don’t get it to be honest.
Anyway let’s hope someone is listening, because this little change would be surprisingly important for some.

I agree with you this would be useful. As mentioned in the YT, this change would require the tool to be rewritten in Eto. I’ll ask if this can be added as 8.x (see yt)


As a non programmer I probably don’t understand the challenges here, especially as blendsrf allready uses the exact input fields and sliders we are asking for.
Again, probably due to ignorance from my side.
Thanks for taking the time to add my remarks.

Thanks Gijs.
I think I was confused by the description in the documentation for the Adjustable curve blend command, since it is so similar to the documentation description for surface blend.

Plz add my vote for this.
I thought to have it since V5 !