Friday, December 9th, 2022 Posted by Jim Thacker

Reallusion ships AccuRig 1.1

Originally posted on 20 August 2022. Scroll down for details of the AccuRig 1.1 update.

Reallusion has released AccuRig, a new free automatic rigging tool for 3D characters.

The software generates full-body and finger rigs for biped characters, and exports them in FBX and USD format for use in DCC apps and game engines like Blender, Cinema 4D, Omniverse, Unity and Unreal Engine.

An alternative to Adobe’s free Mixamo auto-rigger
AccuRig – or, to give it its full title, ActorCore AccuRIG – is Reallusion’s counterpart to the automatic character rigger available with Mixamo, Adobe’s free online library of 3D characters and motion clips.

The software is designed for use with ActorCore, Reallusion’s own online library of 3D characters and motions, some of them available for free, but can be used independently of it.

Automatically generate full-body and hand rigs for biped characters
Workflow in AccuRig begins with importing a biped character in OBJ or FBX format.

Reallusion recommends that characters should be a T-pose or an A-pose – including the variant with bent wrists often found in 3D scans – although AccuRig will attempt to rig characters in custom poses.

It is also possible to import characters with multiple meshes: for example, for clothing or props.

The software then automatically assigns a standard 19-joint full-body rig to the character, with users able to customise the proportions of individual joints by dragging markers around in the viewport.

Hand rigs are generated separately, with the option to generate a rig with up to five fingers.

The resulting rig can then be previewed inside the software using a range of stock animations, with users able to offset the pose of individual body parts via slider controls to avoid artefacts or interpenetration.

Rigged characters can be exported in iAvatar format for use in Reallusion’s iClone animation software, or in FBX or USD format, making it possible to use them in standard DCC applications and game engines.

There are FBX export presets for 3ds Max, Blender, Cinema 4D, Maya, MotionBuilder, Unity and Unreal Engine, and a USD export preset for Omniverse.

A quick way to rig low-poly character for games, augmented reality and motion graphics
AccuRig looks to be a quick way to generate character rigs, particularly for low-poly stylised characters.

On its website, Reallusion suggests it as a way to rig 3D scanned characters, or to pose digital sculpts created in tools like ZBrush.

However, as of AccuRig 1.0, the software’s home screen suggests that imported characters should be under 600,000 triangles, which would mean that raw scans and sculpts would need some retopology work first.

Updated 8 December 2022: Reallusion has released AccuRig 1.1.

The update makes a number of workflow improvements, including the option to toggle between six camera views (top, bottom, front, back, left, right) of the character, to make it easier to position joints correctly.

There are also updates to finger rigging and to symmetry, including a new Force Symmetry option for rigging perfectly symmetrical characters, which automatically mirrors all edits from one side of the body to the other.

Pricing and system requirements
AccuRig is available for Windows 8+. It’s a free download. To export a rigged 3D character, you will need to register for a free ActorCore account, even if you are only exporting locally.

Download free character auto-rigging tool AccuRig from Reallusion’s website

Read more about AccuRig in the online manual