Six Notch Types
I, V, T, U, External, and Drill Hole — correct geometry for hand, CNC, and laser cutting.
Now Available · Native Rhinoceros 3D Plugin
Automated notch marks & seam allowances for Rhinoceros 3D.
RhinoNotchesPro automates the placement of notch marks, target marks, drill holes, and seam allowances on your flat patterns — a smarter pattern-making workflow directly inside Rhinoceros 3D.
6Notch Types
1-ClickWorkflow
7 & 8Rhino Versions
€19From / Month
Showcase
See it in action.
Toolbar, dockable panel, and seam-allowance tools — everything inside the Rhino viewport.
Features.
Dockable Panel
Every setting at hand without leaving the viewport. Settings persist between sessions.
Seam Allowance Tools
Add seam allowances directly on flat patterns, with adjustable widths between notch points.
Smart Corner Detection
Skips sharp angles where notches would overlap. Threshold is adjustable.
Variable Seam Widths
Hems, zippers, and structural edges — each with its own offset on the same pattern.
Restore Original Curve
Roll any processed curve back to its original boundary in one command.
How it works.
-
1
Select curves
Pick one or more closed boundary curves.
-
2
Choose notch type
Toolbar, panel, or command line.
-
3
Set parameters
Depth, angle, spacing, seam allowance.
-
4
Run command
One click places every notch.
-
5
Review
Corner warnings surface in the command line.
-
6
Export
Standard Rhino geometry → DXF, DWG, PDF.
Who it's for
For people who flatten 3D surfaces and cut patterns.
Built from 14+ years inside marine soft-goods production — and useful anywhere flat patterns become physical things.
- Marine canvas & upholstery
- Boat canopies & covers
- Furniture & automotive interiors
- Garment & textile patterns
- CNC & laser cutting
Technical details.
- Platform
- Windows. macOS support in testing — apply as a beta tester.
- Rhino Version
- Rhino 7 & Rhino 8
- Runtime
- .NET Framework 4.8
- Plugin type
- Native Rhino plugin — runs independently, no Grasshopper required
- Install
- Drag & drop the .rhp file onto Rhino
- Commands
- Notches, Notches_3mm, Notches_5mm, VNotches, INotches, TNotches, UNotches, ExternalNotches, DrillHoles, SeamAllowanceNotches, AdjustThreshold, RhinoNotches_Panel
- Export
- DXF, DWG, PDF, AI — any Rhino-supported format
- License
- Single-machine license — transferable to a new computer, cooldown between transfers
Release Notes
Full Release History
v1.0.5
Bug Fixes
- A notch landing on the seam of a closed curve no longer deletes the notch next to it — the seam is moved away from the notches first, and the shape of the curve is unchanged
- I-Notches and T-Notches with "Separate notch marks" off produced only one notch out of eleven; the rejoin tolerance was wider than the slit itself. This also explains the earlier report that T-Notches looked "invisible" in this mode
- V, U and External notches are unaffected and produce identical geometry
Improvements
- A notch that genuinely cannot be placed is now reported with the reason, instead of an internal-looking log line
- If the rebuilt curve comes apart, the command says so rather than discarding the missing notches silently
v1.0.4
New Features
- I-Notch "Narrow V cut" — replaces the 0.05 mm slit with a configurable narrow V for cutters that cannot resolve it
- I-Notch default angle 5 degrees, used by Narrow V cut
Improvements & Fixes
- "Separate notch marks" defaults to ON for new installs
- License dialog no longer re-opens on every tool selection after a benign machine-fingerprint change
- Variable Seam Allowance: corrected curve rebuild when notches are remapped onto the offset boundary
v1.0.3
New Features
- DrillHoles: Free and Curve modes, with auto-find points near closed curves
- DrillHoles: TrimEdge merges edge-intersecting holes into the boundary curve
- Check for Updates command
Improvements
- Separate mode auto-enables for I-Notch and T-Notch
- License validated once per Rhino session instead of on every command
- Toolbar extraction falls back to a writable AppData folder
v1.0.2
New Features
- DrillHoles: Curve mode with auto-find points near closed curves
- DrillHoles: TrimEdge merges edge-intersecting holes into boundary
- DrillHoles: Single-click Mode toggle (Free / Curve)
Improvements
- I-Notch & T-Notch: Separate mode on by default
- License check optimised — no repeated prompts
- Updated built-in help documentation
v1.0.1
New Features
- Variable Seam Allowance per region
- Mixed Notches on a single curve
- Restore Original Curve
- Measure Segments
- Built-in searchable help
- Export / Import settings
- Embedded toolbar
Improvements
- Command-line syncs with panel settings
- Better point detection on curve edges
v1.0.0
Initial Release
- 6 notch types: I, V, T, U, External, Drill Hole
- Dockable settings panel & persistent settings
- Auto-find points & seam allowance workflow
- Smart corner detection & layer organisation
- 13 commands via toolbar and command line
From €19/month.
Flexible monthly, annual, and perpetual license options. 14-day money-back guarantee on every purchase.
RhinoNotchesPro
All plans include full features. Choose the cadence that fits your team — monthly, annual, or one-time perpetual licence.
Flex
€
19
/month
Billed monthly · cancel anytime
- All features included
- Updates during subscription
- Email support
- Cancel anytime
Pro
€
149
/year
Save 35% vs. monthly
- All features included
- Updates during subscription
- Priority email support
- Cancel anytime
Perpetual
€
249
one-time
Pay once, use forever
- All features included
- 1 year of updates & support
- Permanent license · single-machine with transfer cooldown
- Optional renewal for continued updates
All prices excl. VAT. Tax is calculated at checkout based on your location.
14-day money-back guarantee on every purchase.
Ready to automate your notching?
From €19/month with a 14-day money-back guarantee. Start producing cleaner patterns — or send a question first.