I am struggling to create a clean surface in this opening. Sweeps or patch do not yield the simple surface that I am after. I want it to be tangent to the adjacent surfaces and not trimmed. I have spent hours reviewing 36 Verts surfacing videos, but I’m just not finding a solution.
Any help or advise is greatly appreciated.
STRUGGLE BUS.3dm (119.2 KB)
that is impossible just to set your expectations straight, at least not a single surface. you have to divide it into a couple quadrilaterals. alternatively if you have access to Rhino WIp try FillSrf.
Hi Martin. Just wondering which version Rhino you are using. I don’t get the same options control your screenshot is displaying for FillSrf, in 7,8, or wip9 for windows. I know I got the latest wip9 update yesterday or perhaps the day before.
Thanks for your helpp
Gavin
Should be the latest WIP
STRUGGLE BUS.3dm (186.2 KB)
Rhino 9 SR0 2025-6-10 (Rhino WIP, 9.0.25161.12305, Git hash:master @ c31e7436f1988e26f812b86dfea591758b035e0a)
License type: Commercial, build 2025-06-10
License details: Cloud Zoo
Expires on: 2025-07-25
Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 128GB)
.NET 9.0.6
Computer platform: DESKTOP
Standard graphics configuration on OpenGL
Primary display: NVIDIA RTX A5000 (NVidia) Memory: 24GB, Driver date: 5-12-2025 (M-D-Y). OpenGL(4.6.0 NVIDIA 573.24)
> 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.
NVIDIA Quadro K2200 (NVidia) Memory: 4GB, Driver date: 5-12-2025 (M-D-Y).
> Accelerated 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: 5-12-2025
Driver Version: 32.0.15.7324
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 24564 MB
Rhino plugins that do not ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\ConstraintsUI.rhp “Constraints UI” 9.0.25161.12305
Rhino plugins that ship with Rhino
C:\Program Files\Rhino 9 WIP\Plug-ins\Commands.rhp “Commands” 9.0.25161.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 9.0.25161.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 9.0.25161.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 9 WIP\Plug-ins\MeshCommands.rhp “MeshCommands” 9.0.25161.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\IronPython\RhinoDLR_Python.rhp “IronPython” 9.0.25161.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles” 9.0.25161.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 9.0.25161.12305
C:\Program Files\Rhino 9 WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 9 WIP\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 9 WIP\Plug-ins\SectionTools.rhp “SectionTools”
Ok. AS usual I was not paying attention - I was trying to work with FilletSrf, not FillSrf - so yes I see the controls now and can match your results, Thanks as always.
Gavin
Thanks Martin,
I didn’t even know that WIPs were a thing. Obviously this is a trimmed multi span surface and not a method of creating single span surfaces to fill the shape, but it definitely yields a way better result than patch or sweeps. I really appreciate your help.
as i have mentioned above this is a thing of impossibility. NURBS Surfaces are always quadrilaterals. any surface that hast more or less than 4 boundaries is inherently trimmed, or in case of less you can also create singularities, but 5 sided untrimmed NURBS surfaces do simply not exist.
to be fair such 5 sided blends are always obnoxiously difficult to make with traditional non trimmed surfaces, it usually involves quite some experiences and a bit time. you can mess around on these things forever and still be a noob…
here is a very simple aproach with 2 quadrilaterals, if any of the more experienced nurbs doctors will see it they might start laughing, fortunately there are not so many around these days, which on the other side is also quite a bit unfortunate
i created 2 lofts and matched them with multiple, there is still a bit some matching to be done, and maybe you have to go back and rebuild once more but it looks like it could actually work out eventually.
no magic bus.3dm (103.5 KB)
What’s so bad about a trimmed surface?
I think the constraints you have set for this surface are such that you’ll never get a satisfying surface no matter how long you try. The corner (Where the curve is drawn) has a nasty torsion. It would be useful to get a bit more context what you are designing.
pursuing untrimmed surface(s) for this is quite a waste of time
a solution, see if it suits you
STRUGGLE BUS_mod01.3dm (277.6 KB)
variant 2
STRUGGLE BUS_mod02.3dm (304.6 KB)
