The RenderBoost Addon speeds up animated renders in Blender using frame interpolation. Instead of rendering every frame, it generates additional frames from your existing image sequence, so fewer frames need to be rendered directly. The developer states this can cut animated render times by up to 80%, though the actual savings depend on your hardware; testing was carried out on a system with an NVIDIA GeForce RTX 3070 Ti, AMD Ryzen 7 3700X, and 32GB of DDR4 memory.
The interpolated frames blend with your rendered frames to keep motion fluid, and customisable settings let you set the number of interpolated frames to balance smoothness against computational cost. The addon also handles automatic video creation, offers command line support, and integrates into your existing Blender workflow with its own interface and controls.
A separate RenderBoost Pro version adds GPU acceleration to speed up interpolation, plus advanced denoising and upscaling. Because the tool relies on interpolation, scenes with fast-moving objects or heavy motion blur can occasionally produce artifacts, and the addon is actively developed with ongoing bug fixes and new features.