Rhino 8 plugin / Completely Free

Slab fillets and mullions, automated.

How to Rhino Tools is a free plugin with four commands for the boring part of facade modeling. Fillet every slab in one go, cover flat, intersected, and curved surfaces with mullions, and see a live preview before anything is created.

  • Rhino 8 on Windows and Mac
  • Free, no account needed
  • Built by How to Rhino
Distributed via

Why How to Rhino Tools

Preview it. Tune it.
Create it once.

A 60-storey tower has dozens of slabs that need the same fillet and hundreds of mullions on a facade that keeps changing shape. Doing that by hand takes days. Each command in How to Rhino Tools opens a preview dialog: drag a slider, watch the geometry update in the viewport, and only click create when it looks right. The result lands on the layer you choose, cleaned up and ready to render.

Free, really

How to Rhino Tools is completely free.

No account, no credits, no trial. Install it from Rhino's built-in Package Manager and start using it on your own projects today. These commands were born inside our One Thousand Museum mini course, and we released them so everyone can skip the tedious part of facade modeling.

Install it now

The commands

Four commands. All with live previews.

Type the command name in Rhino, select your geometry, and tune the result in a preview dialog before anything is created.

The SlabFillet preview dialog in Rhino, filleting every selected slab with a live preview

SlabFillet Solids

Select your floor slabs and get a uniform corner fillet on every one of them at once. A slider with a live preview shows the fillet range your slabs allow, with a vertical edge tolerance and an option to delete the originals.

The SurfaceMullions preview dialog covering a tapered tower with a red mullion grid preview

SurfaceMullions Surfaces

Turn any polysurface into a full mullion grid. Every edge becomes a mullion, evenly spaced face mullions fill the bays, and you control width, depth, maximum spacing, and the output layer from the preview dialog.

The FloorMullions preview dialog placing perimeter mullions across the floor plates of a zigzag tower

FloorMullions Slab intersections

For facades that step across floor plates, including zigzag faces. Select the surface and the slabs that intersect it, then center and balance mullions per face or force exact divisions so every bay reads the same.

The CurveMullions preview dialog building a mullion grid across a doubly curved glass surface

CurveMullions Curved glass

Mullions for doubly curved surfaces. Pick the surface, the curves lying on it that mark your divisions, and an optional reference direction curve, and the command builds the grid following the surface.

Every command: Live viewport preview· Output layer picker· Clean, joined geometry· Keep or delete source

Rhino 8 on Windows and Mac.

Install

In Rhino in under a minute.

  1. 1
    In Rhino 8, type PackageManager in the command line and press Enter.
  2. 2
    Search for How to Rhino Tools.
  3. 3
    Select it, click Install, and restart Rhino when prompted.
  4. 4
    Type SlabFillet, SurfaceMullions, FloorMullions, or CurveMullions to run a command.

Where it comes from

Watch these commands get built, live.

We wrote all four commands with Codex, on camera, while modeling Zaha Hadid's One Thousand Museum in Miami for a How to Rhino Premium mini course. The recording shows the whole process, prompts, bugs, and back-and-forth included, so you can learn to build your own Rhino tools the same way. Then we used them to fillet 62 floors of slabs and cover the whole facade with mullions.

See the mini course
Zaha Hadid's One Thousand Museum modeled in Rhino for Mini Course #23

From the team behind

How to Rhino

The education brand thousands of Rhino designers already learn from. How to Rhino Tools is built by people who use Rhino every day, for people who do the same.

We are Dusan and Lazar, the architects behind How to Rhino. Our mission is to reach as many architects as possible and help them learn Rhino and Grasshopper3D specifically for architecture.

We run a free community on Skool where we talk with students every day, a paid community with monthly workshops, mini courses, and live reviews, and intensive courses with a proven, step-by-step learning system.

How to Rhino is an official Authorized Rhino Training Center, approved by McNeel. How to Rhino Tools, like RhinoFrame, is a tool we built for the same people we teach every day.

Dusan and Lazar, founders of How to Rhino

15+

Years of experience

895

Students

89,600+

YouTube subscribers

102,144+

Instagram followers

210,744+

People in our community

Free forever for the community

Get How to Rhino Tools.

Open the Package Manager in Rhino 8, search for How to Rhino Tools, and install. That's the whole onboarding.

Questions

Good to know.

Can't find it? Email us.

Is it really free?

Yes. How to Rhino Tools is completely free, with no account, credits, or trial period. Install it from the Package Manager and use it on any project, commercial work included.

Which Rhino versions are supported?

Rhino 8 on Windows and Mac. Rhino 7 is not supported.

What exactly do the commands do?

SlabFillet puts a uniform corner fillet on every slab you select. SurfaceMullions builds a mullion grid on any polysurface. FloorMullions handles facades that intersect floor plates, including zigzag faces. CurveMullions follows doubly curved surfaces using your division curves. All four show a live preview before creating anything.

How were these commands made?

We wrote them with Codex, live on camera, during our One Thousand Museum mini course in How to Rhino Premium. The mini course shows the whole process, prompt by prompt, so you can learn to build your own Rhino tools the same way.

I found a bug or have a feature idea. Where do I send it?

Email us. The plugin grows with the projects our community throws at it.