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FredoSpline v2.6a
- Overview
- Documentation
- Release Notes
Overview of FredoSpline
- Sketchup version: SU2017 and above
- Platform: Windows and Mac OSX
- LibFredo6: v14.3b or above
- Usage: Paid, Licensed under Sketchucation SCFLicense v4.4.0
- Free Trial period (full features): 15 days from activation
- Perpetual license (3 seats): $30 (~28€)
- Rush license (3 seats, valid 21 days from purchase date): $8 (~7€)
- Information on licensing extensions at Sketchucation: this post
FredoSpline is an extension dealing with Curves based on Control Points.
It includes the following families of curves
- Bezier: Smooth curves NOT passing through the control points
- Fit Spline: Smooth curves passing through the control points with local or global control
- Polycorner: Polylines with configurable shaping of corners at each vertex
- Polyline: Polylines with division patterns

Discussion forum
Links to Sketchucation Forum: Main Post Latest Release
Installation of FredoSpline
IMPORTANT: Make sure that you have first installed LibFredo6.
FredoSpline is released as a regular RBZ extension file on the Sketchucation Site.
To download the RBZ file, use the red button on the right side of this page:
- Download If your are already logged in.
- Log in to get it! otherwise, in order to log in or to register to Sketchucation as a new user (this is FREE). Then you will be able to download the RBZ file.
Then, you can install the RBZ file from within Sketchup, via the Sketchup Extension Manager
If you are not familiar with the installation of Sketchup extensions and Sketchucation, it is advised to watch the video LibFredo6 installation.
IMPORTANT: Whatever way you choose, you MUST quit and restart Sketchup to get FredoSpline (and LibFredo6) properly loaded.
After the installation, you should have the following footprint in the Sketchup Plugins directory:

- Language: English
- Menus: by default, it is installed in Tools > Fredo6 Collection > FredoSpline...
- Icon toolbar: FredoSpline
Permission to use this software for any purpose, subject to license, is hereby granted Distribution of this software for any purpose is subject to: - the expressed, written consent of the author - the inclusion of the present copyright notice in all copies. |
Full documentation is provided in the Instructor window accessible from within the extension.
You can also consult the extracted PDF attached in the main post of the FredSpline forum page
Links to Sketchucation Forum: Main Post Latest Release
Release History
FredoSpline 2.6a - 01 Apr 24: Future compatibility
FredoSpline 2.5a - 01 Mar 23: Fix a weird issue specific to SU2023 related to Convert Curve within context
FredoSpline 2.4a - 25 Dec 22: Suppression of date of validity
FredoSpline 2.3a - 01 Nov 21: Minimum number of segments for PolyCorner curves
FredoSpline 2.2a - 31 Aug 21: Extension of validity
FredoSpline 2.1a - 22 Apr 21: Performance of selection contextual menu
FredoSpline 2.0a - 24 Jan 21: FredoSpline becomes a paid plugin licensed under Sketchucation
FredoSpline 1.7a - 06 Jan 21: Extension of validity
FredoSpline 1.6a - 19 Nov 20: Help in separate dialog and extension of validity
FredoSpline 1.5a - 19 Aug 20: Cosmetic adjustments and extension of validity
FredoSpline 1.4a - 01 Jun 20: Bug fixing and cosmetic adjustments, most for Mac (keyboard)
FredoSpline 1.3a - 25 May 20: Bug fixing and cosmetic adjustments, most for Mac
FredoSpline 1.2a - 29 Apr 20: First version that should work on Mac
FredoSpline 1.1a - 22 Apr 20: Initial public release