SURFACE MULLIONS - Oriented Mullion Generator - Grasshopper Script
Grasshopper Script
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Surface Mullions — Rhino and Grasshopper Tool for Automatic Mullion Placement on Any Surface
📐 A Rhino and Grasshopper tool that automatically places mullions across a surface at any spacing — built to handle trimmed surfaces, irregular boundaries, surfaces with holes, and curved geometry. Set the surface, spacing, and mullion dimensions, and the script generates a clean, oriented mullion grid ready to bake.
What's inside
📐 Full Grasshopper definition (.gh) — the complete tool, ready to drop into your workflow.
⚙️ Parametric controls — adjust approximate panel spacing, interior mullion size, and exterior boundary mullion size independently.
🪟 Mullion placement workflow — automatically orients mullions across trimmed, untrimmed, and irregular boundary surfaces.
🏛️ Hole and cutout support — handles surfaces with one or multiple interior openings.
🎯 Bake-ready output — clean Rhino geometry split into interior and boundary mullion groups.
📁 Example setup — included in the product images and video for reference.
Specs
Type: Grasshopper definition (.gh) Skill level: Beginner to intermediate Grasshopper users
Inputs: Surface, panel size, interior and exterior mullion size, bake controls Outputs: Oriented mullion geometry, bake-ready Rhino geometry Delivery: ⬇️ Instant download
Compatible with
Rhinoceros 3D · Grasshopper
Perfect for
Façade studies where mullion patterns need to update quickly as the design shifts; skylight layouts and roof glazing systems; canopy mullion grids and atrium roof studies; panelized surface studies and conceptual curtain wall layouts; irregular surface subdivision and free-form design exploration; early and schematic design phases where speed matters more than fabrication detail; architecture students and professionals automating repetitive Rhino + Grasshopper work.
How to use
- ⚡ Download the .gh file from your account dashboard after purchase.
- Open Rhino and launch Grasshopper.
- Open the Surface Mullions definition in the Grasshopper canvas.
- Reference your design surface from Rhino into the definition.
- Adjust the spacing and mullion size sliders until the layout reads as intended, then bake the geometry.
License
✅ Single-user license — for personal, academic, and professional use by one user (façade studies, design exploration, conceptual layouts). This tool is intended for design studies and workflow acceleration, not fabrication-ready curtain wall engineering — always review and coordinate final geometry to your project requirements. Resale, redistribution, repackaging, or uploading the definition as your own product is prohibited.
How do I get my files?
Your download links are emailed to you as soon as the payment is confirmed, and the same files stay in your account under Orders. Nothing is shipped and nothing expires, so you can download them again whenever you need them, on any device.
If the email has not arrived after a few minutes, check your spam folder or contact us and we will resend it.
License and commercial use
You can use every file you buy here in your own work: student projects, competition boards, portfolios, presentations and paid client projects. No credit required.
What is not allowed: reselling or redistributing the files themselves, sharing them outside your own team, or putting them into another product that is offered for sale.
One purchase covers one person. For a studio or a classroom licence, get in touch.
14-day money-back guarantee
If a file is not what you expected, write to us within 14 calendar days of your purchase and you get your money back in full, no questions asked. Digital files are covered exactly like anything else in the store.
Details are in our refund policy.
Customer Reviews
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Jessica
May 24, 2025
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May 24, 2025
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As an architect working under tight deadlines, finding reliable digital content is a game-changer. This shop has become one of my go-to places for support and inspiration.
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Architecture Photoshop Pack
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Jessica
May 24, 2025
★★★★★
high-quality architectural resources
I’ve been searching for high-quality architectural resources for a while, and this shop truly exceeded my expectations. Everything feels thoughtfully curated and designed with professionals in mind.
All In One Architecture Diagram/Drawing Essential Bundle
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Olivia
May 24, 2025
★★★★★
Impressive work
Impressive work! The files were easy to access, and everything felt intuitive even from the first use. You can tell this was created by people who truly understand the industry.
40 SANAA Animated People + Adding Animations Tutorial
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Daniel
May 24, 2025
★★★★★
This shop has become one of my go-to places for support and inspiration.
As an architect working under tight deadlines, finding reliable digital content is a game-changer. This shop has become one of my go-to places for support and inspiration.
Morpholio Trace: Private (1 on 1) Sketching Session for 2D Landscape Plan Renderings
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Thomas
May 24, 2025
★★★★★
improved the way I approach my work
This has honestly improved the way I approach my work. The attention to detail and usability is evident. Highly recommend to anyone in the field of architecture or design.
Architecture Photoshop Pack
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Sofia
May 24, 2025
★★★★★
Professional, well-organized
Professional, well-organized, and visually clean — everything about this store makes the creative process easier and more enjoyable.
AI-Presentation Plan Photoshop Action
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Jessica
May 24, 2025
★★★★★
high-quality architectural resources
I’ve been searching for high-quality architectural resources for a while, and this shop truly exceeded my expectations. Everything feels thoughtfully curated and designed with professionals in mind.
All In One Architecture Diagram/Drawing Essential Bundle
-
Olivia
May 24, 2025
★★★★★
Impressive work
Impressive work! The files were easy to access, and everything felt intuitive even from the first use. You can tell this was created by people who truly understand the industry.
40 SANAA Animated People + Adding Animations Tutorial
-
Daniel
May 24, 2025
★★★★★
This shop has become one of my go-to places for support and inspiration.
As an architect working under tight deadlines, finding reliable digital content is a game-changer. This shop has become one of my go-to places for support and inspiration.
Morpholio Trace: Private (1 on 1) Sketching Session for 2D Landscape Plan Renderings
-
Thomas
May 24, 2025
★★★★★
improved the way I approach my work
This has honestly improved the way I approach my work. The attention to detail and usability is evident. Highly recommend to anyone in the field of architecture or design.
Architecture Photoshop Pack
-
Sofia
May 24, 2025
★★★★★
Professional, well-organized
Professional, well-organized, and visually clean — everything about this store makes the creative process easier and more enjoyable.
AI-Presentation Plan Photoshop Action
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