Contour Rig Tools vs Mesh2Motion

Contour Rig Tools is a spline-based rigging system for Autodesk Maya, designed for animation production and technical directors. Contour joint chains generate splines that serve as single deformer influences, potentially reducing weight-painting work. Its volume-aware spline deformation handles bends and twists and is designed to avoid pinching and candy-wrappering. Contour Bones include length and stretch controls, and bone CVs can be used as spline control points. Built-in IK includes stretch and anti-pop features, while constraints drive transforms and relationships between Contour chains. A Python API can create, modify, and query Contour nodes, accepting strings, pyNodes, and MObjects. The tool can drive conventional Maya joints for game-engine export. Version 1.0.12.1 supports Maya 2020 through 2026, except Maya 2023.0, 2023.1, and 2024.0; downloads are provided for Windows, Linux, and macOS. Animator Mode is free for animating with rigs and adding bone CVs. Creating or modifying rigs requires Rigger Mode, starting at $40 a month billed for twelve months.

Mesh2Motion is a 3D animation library and auto-rigging tool for web and game engines. Users can browse over 170 animations, preview them on a sample model, and upload a model for auto-rigging or use one that is already rigged and skinned. It imports GLB, GLTF, DAE and FBX models, with listed rigs for humans, birds, dragons, spiders, kaiju, foxes, horses, fish and snakes. Editing tools include skeleton positioning, undo and redo, and animation imports for compatibility checks. Multiple animations can be exported together in one GLB or FBX file. The maker says an offline desktop version for Windows, Mac and Linux has the same features as the online version. The tool is free for personal or commercial use, and the models, rigs and animations are CC0. Source Blender files are available for study and improvement. The September 25, 2026 update added mirrored animation export and FBX 7.4 export formats for Unity3D and Unreal Engine.