Blender integrated AI-based denoising into its Cycles render engine, offering users machine learning tools that clean up noisy rendered images, significantly reducing the number of render samples needed. Users can opt to apply Intel's Open Image Denoise (OIDN) or NVIDIA's OptiX AI denoiser within the software.

The Denoise node in Blender's compositor uses Intel's Open Image Denoise (OIDN), which applies machine learning to transform noisy rendered images into clean outputs. OIDN was first added in Blender 2.81 (2019), and NVIDIA OptiX AI-Accelerated viewport denoising was added in Blender 2.82 (2020). Both denoisers take noisy render passes (color, albedo, normal) as input and produce cleaned image output. As of Blender 4.1, OIDN can also run on the GPU across NVIDIA, AMD, and Apple Silicon hardware.