RadianceKit

RadianceKit is a native macOS app for 3D Gaussian Splatting made by Björn Kindler, an independent developer based in Unterhaching near Munich, Germany. It reached the Mac App Store in March 2026 and stands at version 1.8.10, released in November 2026. The app runs the whole pipeline on the Mac, from import through camera alignment, training and editing to export, with no cloud upload, no account and no Python environment. Kindler describes the project as self-funded and says it grew out of more than 560 documented training experiments.

Input is photos, video or an existing dataset. Camera poses come from Apple Photogrammetry or from the app’s own native structure from motion solver, and a COLMAP workspace can be dropped in to skip alignment entirely. Training runs on the Apple Silicon GPU through Metal with a live preview in the viewport, and offers Classic and MCMC densification plus a hybrid preset that combines the two. Simple Mode reduces the workflow to import and Start, while Expert Mode exposes a project navigator, a 3D viewport and an inspector with training parameters and live loss curves. A benchmark mode reports PSNR, SSIM and LPIPS.

RadianceKit imports 360 photos and video natively. It detects equirectangular, stereo 360, cubemap, equi-angular cubemap, fisheye and partial panorama files from their metadata and unwraps each frame into overlapping perspective views before alignment. Version 1.8.10 accepts Insta360 X6 .insv files directly, with no export from Insta360 Studio, and works with the images of both lenses. Dedicated 360 Outdoor and 360 Indoor presets sit alongside capture class presets for drone and aerial, walkaround and object captures.

The scene editor selects regions with a brush and deletes them, and version 1.8.0 added a cylinder crop, a movable editing slab, colour matching against a painted reference area and multi-step undo. Export covers PLY, compressed PLY, SPZ, glTF, .splat and SOG, along with orbit videos and self-contained interactive web viewers, and finished scenes can be published to SuperSplat. Since version 1.7.0 the viewport uses an in-house renderer in place of MetalSplatter. The camera solve can also leave the app as a COLMAP workspace or a transforms.json file for use in other trainers.

RadianceKit requires an Apple Silicon Mac, M1 or later, running macOS 26 Tahoe or later, with 16 GB of RAM recommended, and Intel Macs are not supported. It is free to download with a 3 day trial of all features, after which a one time in-app purchase of US$7.99 unlocks the full version with no subscription. RadianceCap, a free iPhone companion app released in August 2026, stores camera pose, optics and LiDAR depth with every photo on a LiDAR capable iPhone running iOS 17 or later and passes the capture to RadianceKit through iCloud, AirDrop or Files. The interface and manual are available in 18 languages.