by Mush3D·Modeling
Images © Mush3D. Used for product review; image policy.
Stands out in the superhive library for training deformation from pose examples rather than stacking corrective shape keys and drivers, while keeping the original rig untouched through a separate output mesh.
Multi Delta Mush takes a different route to character deformation in Blender. Rather than building corrective shape keys, drivers, and rig logic, you train the deformer from pose examples: supply a bind mesh along with corrective sample meshes that share matching topology, and the add-on learns how those corrections should blend across the character during animation.
Because it creates a separate output mesh, your original source rig stays untouched. That makes it a fit for testing deformation improvements, building cleaner character pipelines, and reducing the need for heavy corrective setups inside the rig itself. The output mesh updates live while you pose or scrub through animation, and envelope, mask, relax, and stack iteration controls give you room to tune the result.
A compiled C++ deformation core handles performance, with a CPU backend included and optional OpenCL acceleration. The first release supports Windows x64 and Blender 5.1.x, and source, bind, and corrective sample meshes must share the same vertex count and vertex order. It's aimed at character artists, riggers, and technical animators.
Multi Delta Mush is best for character artists, riggers, and technical animators who want cleaner deformation without adding more layers of rig complexity.
Multi Delta Mush is completely free to download and use.
Multi Delta Mush is a Blender add-on, and its first release supports Windows x64 and Blender 5.1.x. If you're on that combination, you can install it and start training the deformer from pose examples. It's listed as a Blender extension of the add-on type. For other operating systems or Blender versions, check the developer's page, since this initial release lists Windows x64 and Blender 5.1.x as its supported setup.
Multi Delta Mush relies on matching topology across the meshes you feed it. The source, bind, and corrective sample meshes must share the same vertex count and vertex order. You provide a bind mesh together with corrective sample meshes, and the add-on learns how those corrections should blend across the character during animation. Keeping vertex count and order consistent is essential, so plan your corrective poses around meshes that match the bind mesh exactly.
Multi Delta Mush ships with a CPU backend included, so a GPU is not required to run it. It also offers optional OpenCL acceleration if you want to lean on GPU compute. The deformation itself runs on a compiled C++ core built for performance, and the output mesh updates live while you pose or scrub through animation. If your hardware supports OpenCL, you can enable that acceleration; otherwise the CPU backend covers the work.
Multi Delta Mush is listed as free here in the catalog. Licensing terms can change, so check the developer's page for current details before using it in your projects. The add-on is aimed at character artists, riggers, and technical animators, and it creates a separate output mesh that leaves your original source rig untouched. For the latest licensing information and any usage terms, refer to Mush3D's page.
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