Curviloft is a powerhouse SketchUp extension by Fredo6 designed specifically for creating complex organic shapes and skins that standard tools like "Follow Me" can't handle. It is widely considered essential for advanced 3D modeling and architectural visualization. Key Features The plugin operates through three primary tools:
Loft by Spline: Connects separate, non-parallel contours (like a circle to a square) with smooth transition surfaces.
Loft along Path: Joins contours by following a specific guide rail or path curve.
Skinning: Creates a surface or "skin" bounded by 3 or 4 contiguous edges/contours. Installation & Pricing
To use Curviloft, you must first install the LibFredo6 shared library.
Master Organic Shapes: A Guide to the Curviloft Plugin for SketchUp
If you’ve ever tried to model a complex, swooping roof or a piece of ergonomic furniture in SketchUp using only native tools, you know the struggle. While the
tool is great for basic extrusions, it often falls short when you need to transition between two different shapes or "skin" a complex wireframe. , a legendary extension by
that turns SketchUp into an organic modeling powerhouse. Here is everything you need to know to get started. What is Curviloft? Curviloft is a script dedicated to Loft and Skinning
—generating surfaces from contours. It’s part of the Fredo6 collection and is essential for anyone doing architectural or organic design. Key Features
Curviloft provides three primary tools that handle different geometric challenges: Loft by Spline:
Connects two or more separate profiles. For example, you can seamlessly bridge a square base to a circular top. Loft Along Path:
Extrudes a profile along a specific guiding line or "rail," allowing for precise control over curved forms.
Creates a surface (or "skin") over a frame of three or four bordering contours. This is perfect for filling in complex wireframe structures. How to Install
Because Curviloft is a Fredo6 plugin, it has specific dependencies you must install first:
Curviloft is a powerful organic modeling extension for SketchUp developed by Fredo6. It is essential for creating smooth, complex surfaces from contours or curves—a task that is otherwise difficult to perform manually in native SketchUp. Core Functions Curviloft operates through three primary tools:
Loft by Spline: Joins separate, non-intersecting contours (open or closed) by generating smooth splines between them. For example, it can merge a hexagon and a circle into a single organic form.
Loft Along Path: Follows a designated "rail" curve to join contours, effectively sweeping a shape along a custom trajectory.
Skinning: Creates a surface or "skin" bounded by three or four contiguous contours, filling the frame with new geometry. Why It’s Useful
A plugin similar to Curviloft but different function/features - SketchUp
Curviloft Plugin for SketchUp: Technical Report Curviloft is a specialized SketchUp extension developed by Fredo6 dedicated to lofting and skinning operations. It is primarily used for generating complex organic surfaces from sets of contours or frames that are difficult to model using native SketchUp tools. Core Functionality
Curviloft offers three primary tools for surface generation:
Loft by Spline: Joins separate contours (curves or lines) to create a smooth surface.
Loft Along Path: Follows a predefined path to generate a surface from multiple cross-sections.
Skinning: Creates a "skin" over a frame or a set of intersecting contours to form a solid-looking surface. Key Specifications & Requirements Developer: Fredo6.
Platform Compatibility: Available for both Windows and Mac OSX.
Software Version: Supports SketchUp 2017 and above, including recent 2024 versions.
Mandatory Dependencies: To function, Curviloft requires LibFredo6 (v14.3b or above) and the Sketchucation ExtensionStore (v4.4.0 or above).
Pricing: Currently a paid extension licensed under the Sketchucation SCFLicense. Free Trial: 30 days of full features.
Perpetual License: Approximately $15 for 3 seats, or available in the Fredo6Bundle (8 plugins) for $50. Installation & Usage
Download: Obtain the .rbz file from the SketchUcation Plugin Store.
Installation: Use the native SketchUp Extension Manager or the Sketchucation ExtensionStore to install the RBZ file.
Activation: You must quit and restart SketchUp after installation for the tools to load properly.
Access: Tools are located under Tools > Fredo6 Collection > Curviloft. Troubleshooting Common Issues
Here’s a comprehensive guide to Curviloft for SketchUp, one of the most powerful extensions for organic and complex surface modeling.
Workflow A: Creating a "Möbius" Tensile Roof
- Draw three curves representing the corners of a tensile membrane.
- Use Curviloft (Grid Shell) – not Skin. Select the three boundary edges.
- Set "U lines" and "V lines" to control the grid density.
- Result: A triangulated, doubly curved surface ready for structural analysis.
Mastering Curviloft: The Ultimate Guide to the Best Lofting Plugin for SketchUp
If you have ever tried to model a double-curved roof, a custom boat hull, a parametric facade, or a smooth organic vase in SketchUp, you have likely hit a wall. Native SketchUp tools (Push/Pull, Follow Me, and Sandbox) are excellent for box modeling and basic terrain, but they struggle with complex, flowing geometry. Enter Curviloft.
Developed by the legendary French developer Christophe (TIG), Curviloft is not just another plugin; it is a complete suite of lofting, skinning, and extrusion tools. For architects, woodworkers, product designers, and 3D printing enthusiasts, mastering the Curviloft plugin for SketchUp is the difference between "clunky" and "parametric."
In this article, we will dissect everything you need to know: what it is, how to install it, the three core engines (Skin, Extrude, and Contour), advanced workflows, troubleshooting, and how it compares to modern alternatives.
Error 1: "The number of vertices does not match"
The Problem: You are trying to loft a square (4 vertices) to a hexagon (6 vertices). Curviloft doesn't know how to map the 4 to 6. The Fix: Use the Fredo6 Tools > Curves > Subdivide to add vertices to the square until it has 6. Or, use the Skinning tool instead of Loft, as skinning handles mismatched vertices better.