Curviloft is a specialized extension for SketchUp, developed by Fredo6, that focuses on lofting and skinning to generate complex, organic surfaces from contours. It is widely considered one of the most powerful modeling tools for creating smooth geometry that SketchUp’s native toolset cannot easily produce. Core Functionality
Curviloft provides three primary tools, each accessible via a dedicated toolbar or the SketchUp "Tools" menu.
Loft by Spline: This tool joins separate open or closed contours by creating smooth intermediate splines. It is commonly used to merge different shapes—such as transitioning a hexagon into a circle—by drawing intermediate faces between them.
Loft Along Path: Similar to SketchUp's native "Follow Me" tool, this feature allows a shape to follow a specific "rail" or path. However, it is more advanced because it can transition between multiple different shapes (e.g., square to circle) as it moves along the path.
Skinning (Skin Contours): This tool generates a surface across a 3- or 4-sided frame of edges. It is ideal for creating tensile structures, organic architectural skins, or glass exterior panels. Licensing and Availability
As of 2024, Curviloft has transitioned from a completely free tool to a paid, licensed extension.
Free Trial: A full-featured free trial is available for 30 days from first use.
Pricing: A perpetual license (valid for 3 seats) costs approximately $15. Users can also purchase a Fredo6 Bundle for $50, which includes eight popular plugins.
Distribution: Official downloads are hosted on SketchUcation. Technical Requirements and Installation
To ensure Curviloft works correctly, users must fulfill specific technical prerequisites:
LibFredo6 Dependency: Curviloft requires the installation of the LibFredo6 shared library (v14.3b or above) to function.
Compatibility: Supports SketchUp version 2017 and above on both Windows and Mac OSX. Installation Steps: Download the .rbz file from SketchUcation. Install via the SketchUp Extension Manager. Restart SketchUp to load the plugin properly. Advanced Features for Precision
The plugin includes several interactive settings to refine organic geometry: curviloft plugin sketchup full
Segments Adjustment: Users can increase or decrease the number of segments (up to 99) in the preview mode to control surface smoothness.
Vertex Matching: In preview mode, you can manually drag vertices to adjust how different contours connect, preventing unwanted twisting in the mesh.
Interpolation & Oversampling: These settings allow for more precise control over the density of the generated mesh, helping to manage the model's overall complexity. Curviloft for Sketchup – 2 minute Tutorial
Curviloft is widely considered the gold-standard SketchUp extension for creating complex organic surfaces and lofts. Developed by Fredo6, it is a powerhouse for architectural and product designers who need to bridge the gap between rigid geometry and fluid, "curvy" forms. Core Functionality
Curviloft operates through three primary modes that allow you to generate skins over contours:
Loft by Splines: Joins separate open or closed contours to create a continuous surface. It is perfect for creating fabric-like structures or smooth transitions between different shapes.
Loft Along Path: Follows a specific "backbone" or path to extrude a shape, maintaining the profile's orientation along the curve.
Skinning: Generates a surface from a closed wireframe of edges. This is the "magic wand" for filling in complex gaps in a 3D mesh. Key Strengths
Interactive Preview: Unlike many basic tools, Curviloft allows you to adjust parameters (like segment density and vertex matching) in real-time before finalizing the geometry.
Clean Topology: It generates high-quality quad-faced or triangular meshes that are easier to clean up and more compatible with rendering software.
Edge Smoothing: It automatically handles the "softening" of edges, making your models look professional immediately upon creation. Important Considerations (The "Full" Version)
Licensing: As of recent years, Curviloft is no longer free. It is part of the Fredo6 Bundle on Sketchucation. You must purchase a license (usually a very affordable one-time fee) to access the full, permanent version. Curviloft is a specialized extension for SketchUp, developed
Dependencies: To run Curviloft, you must also install LibFredo6, which is the shared library for all of Fredo6's plugins.
Learning Curve: While the icons are intuitive, mastering "Vertex Matching" (ensuring the skin doesn't twist awkwardly) takes some practice. Final Verdict
If you are moving beyond boxy architecture into organic shapes, Curviloft is essential. It saves hours of manual "stitching" and provides a level of control that SketchUp’s native "Sandbox" tools simply cannot match.
Curviloft is a powerhouse extension for SketchUp, developed by the legendary Fredo6, designed to generate complex surfaces and organic skins from existing contours. Whether you are creating advanced architectural forms or smooth, flowy geometry, Curviloft simplifies the process by joining separate lines or curves into clean 3D faces. Key Features of Curviloft
The plugin is divided into three primary tools that handle different surface generation needs:
Loft by Spline: Joins separate open or closed contours using smooth splines. It is ideal for creating a shape that transitions from one profile to another, such as a square base morphing into a circular top.
Loft along Path: Connects profiles along a specific "rail" or path curve, giving you precise control over the direction and curvature of the resulting skin.
Skinning: Creates a surface bounded by 3 or 4 contiguous contours. This is particularly useful for filling in complex gaps in a model where standard face creation fails. Pricing and Licensing
As of March 2022, Curviloft transitioned from a free model to a paid extension.
Free Trial: A 30-day full-feature trial is available for new users.
Individual License: A perpetual license for Curviloft typically costs $12 to $15.
Bundle Option: You can purchase the Fredo6Bundle, which includes 8 popular plugins (like JointPushPull and RoundCorner), for approximately $40 to $50. Part 4: Advanced Techniques (Unlocking the "Full" Potential)
Licensing: The license is managed via SketchUcation and usually covers up to three seats (computers) per user. Installation Guide
To ensure Curviloft runs correctly, you must install its required dependency first. Curviloft - SketchUcation
The Ultimate Guide to Curviloft: Mastering Organic Modeling in SketchUp
Curviloft is a powerful script by Fredo6 dedicated to lofting and skinning in SketchUp. It allows users to generate complex, smooth surfaces from separate contours—features that the standard SketchUp toolset lacks. Whether you are creating tensile structures, automotive bodies, or intricate furniture, Curviloft is widely considered an essential extension for organic modeling. Key Features of Curviloft
The plugin is divided into three primary tools, each specialized for different surface generation methods:
Loft by Spline: Joins separate contours (open or closed) using smooth splines. It is ideal for creating faces between a series of lines by drawing intermediate edges.
Loft Along Path: Generates surfaces by following a specific rail curve. Unlike the standard "Follow Me" tool, this allows you to add intermediate shapes, transitioning between different profiles like a circle and a square over a single path.
Skinning (Skin Contours): Creates surfaces bounded by three or four contiguous contours. This tool is highly effective for creating "skins" over frames, making it a favorite for architectural tensile structures or glass exteriors. Licensing and Version Information
As of March 2022, Curviloft transitioned from a free tool to a paid extension. Users can obtain a license through the SketchUcation Plugin Store . Curviloft - SketchUcation
Most tutorials stop at basic lofts. Here is what you can do with the paid/full version that the trial cannot.
To truly leverage the full version, you must understand each module.
The plugin installs a toolbar with three primary functions, but the two "heavy lifters" are:
Curviloft is distributed via the SketchUcation or Extension Warehouse depending on the author’s release; check the extension page for the current license, version history, and update notes.