by JamesSnowden·Workflow
Images © JamesSnowden. Used for product review; image policy.
Rbf Drivers earns its place in the superhive library for bringing radial-basis function driving, familiar from Maya and Unreal Engine, to Blender in a pose-based workflow, with no runtime Python and rigs that run without the addon installed.
Rbf Drivers is a Blender addon from JamesSnowden that brings radial-basis function driving, familiar from software like Maya and Unreal Engine, to Blender rigging. Instead of defining how a rig should move, you define what you want it to do: pose your character's bones, adjust controllers, shape keys or other properties, and record a snapshot. The RBF driver fills in the blanks and interpolates smoothly as you pose or animate.
Because the approach is pose-based, a single driver can handle multiple inputs and multiple outputs, with unlimited driven properties controlling bones, objects, shape keys and more. That opens up work that constraints and standard drivers struggle with, such as interpolating shape keys for a shoulder, handling transforms where anatomy squashes, stretches and twists, and positioning secondary deformation bones.
Under the hood, Rbf Drivers builds on Blender's native tools with no runtime Python execution and multi-core operation within the dependency graph. Once a rig is set up it doesn't need the addon installed to work, so you can share, sell or send creations down the pipeline freely. Documentation and Discord support are available.
Rbf Drivers is best for blender riggers and animators tackling shape-key interpolation, awkward anatomical transforms, and secondary deformation bones.
Rbf Drivers is completely free to download and use.
Rbf Drivers is built on Blender's native tools, so once a driver is set up the rig no longer depends on the addon. End-users do not need to have it installed for your creation to work, which means you can share, sell, or send rigs down the pipeline without restriction. This makes finished setups portable across Blender projects and collaborators regardless of whether the recipient uses the addon themselves.
Rbf Drivers lets a single driver handle multiple inputs and multiple outputs at once. With unlimited driven properties, one RBF driver can control multiple bones, objects, shape keys and other properties together. Rather than defining strict mathematical relationships the way Blender's native drivers do for a single driven property, you pose things how you want them to look and the RBF driver interpolates the rest across your setup.
Rbf Drivers runs with no runtime Python execution and uses multi-core operation within Blender's dependency graph. The developer built it for high performance and excellent compatibility, hiding the complexity of an RBF network behind an intuitive workflow and a single, clear interface. Because there is no runtime Python and the addon builds on Blender's native tools, a rig doesn't require Rbf Drivers to be installed once it's set up, letting you share your creations freely.
Rbf Drivers is listed as free in this catalog. For current licensing details and any terms around sharing or selling your creations, check the developer's page. Notably, rigs you build don't require the addon to be installed by end-users, so you can distribute your work down the pipeline without restriction once the drivers are set up. The developer also offers support through a Discord channel and continues to develop the addon over time.
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