by Mizzauro·Modeling
Images © Mizzauro. Used for product review; image policy.
Earns its place in the superhive library for smoothing shape keys while keeping the original Basis volume and shape intact.
Shape Key Smoother is a Blender add-on from Mizzauro for building smooth shape keys quickly. The workflow lets you rough out a shape key and then smooth it by selecting the surrounding area, so clean results come from quick deformations.
The smoothing method preserves the volume and shape of the original Basis shape key. That sets it apart from the Smooth operator in Edit mode and the Smooth brush in Sculpt mode, which tend to distort volume and shape. If you already have shape keys that turned out too smoothed, the add-on can recover the lost detail.
Shape Key Smoother is compatible with Blender 3.6 or later and suits both stylized and realistic work, for characters or any system that relies on shape keys. It's reachable from the right-click context menu, works with symmetry enabled, and handles objects that use drivers. On the superhive library it currently sits around rank 265, and a demo video is available.
Shape Key Smoother is best for stylized and realistic work on characters or any system that relies on shape keys.
Shape Key Smoother is completely free to download and use.
Shape Key Smoother is compatible with Blender 3.6 or later. Support was extended from the range of 4.1 to 4.5 up to 3.6 through 4.5, and later releases added support for Blender 5.0. The listing covers Blender versions 3.6 through 5.1. If you work across several Blender builds, check the developer's page for the version notes that match your setup before installing.
Shape Key Smoother uses a smoothing method that preserves the volume and shape of the original Basis shape key. The Smooth operator in Edit mode and the Smooth brush in Sculpt mode tend to distort volume and shape, so the add-on aims to give cleaner results from quick, rough deformations. The workflow lets you rough out a shape key and then smooth it by selecting the surrounding area, which keeps the underlying form intact rather than flattening it. That makes it suited to both stylized and realistic work.
Shape Key Smoother can recover lost detail from shape keys that turned out too smoothed. If you already have shape keys in a file that have been over-smoothed, the add-on lets you restore detail rather than rebuilding them from scratch. This works alongside its main workflow, where you rough out a shape key and then smooth it by selecting the surrounding area while preserving the volume and shape of the original Basis. That makes it useful both for creating new shape keys and for repairing ones that lost definition.
Shape Key Smoother includes improved compatibility with symmetry enabled, so it can be used while symmetry is active. A recent update also addressed bug fixes that occurred in certain circumstances when using it on an object with drivers. The add-on is reachable from the right-click context menu, which was added in an earlier release, so it fits into the normal editing flow. For the current state of these fixes and compatibility details, refer to the developer's page before installing on production files.
Shape Key Smoother is listed as free here and released under the GPL license. Licensing terms and pricing can change over time, so check the developer's page for the current details before you download or distribute it. The GPL license generally allows you to use, modify, and share the add-on under its terms. If you plan to use it in a studio or commercial pipeline, confirm the current licensing directly with the developer so you know what is permitted for your project.
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