Spirula Studio has released v2026.11.12, which corrects camera calibration residuals such as rolling shutter while training gaussian splatting reconstructions.
The correction fits a smooth warp for each training image that moves the ground truth photo onto the render, aimed at focus breathing, electronic stabilization, rolling shutter and small pose errors. The rasterizer and the loss are untouched, and the warp only changes which ground truth the loss reads. The --calib-correction flag accepts off, basic, which is the default, or accurate, which adds a parallax term, and --calib-warp-grid sets 2 to 16 control points per side, with 9 as the default. The synthetic and academic-baseline presets turn it off. A new blending option in the training GUI shows the remaining calibration error.
Spirula Studio already handled structure from motion inside its own binary, and v2026.10.30 added AprilTag and ArUco marker alignment on top of it. This release adds two SfM components from community contributors. IAMSebyi contributed an experimental GLOMAP-style global mapper, and debsahu added the FlexGlue feature matcher. The same contributor moved attention and large matrix multiplies onto MPSGraph, which speeds up masking and normal and depth estimation on Apple Silicon.
Training changes target distant detail and floaters. Floater suppression now offers mild, moderate and strong levels, with the old strong setting equal to the new moderate, and distraction robustness has moved to the advanced options. An HDR training instability is fixed. The developer describes the quality changes as intended improvements and puts speed and VRAM overhead generally within a few percent.
The native PLY viewer is optimized for large 3DGS files, such as those merged from partitioned training. Training can now start automatically once a dataset is created and run a command when it finishes, the GUI displays camera exposure information, and saved fixed-area masks are better supported.
Spirula Studio ships as a single binary with no Python, PyTorch or separate COLMAP install, and runs on NVIDIA, AMD, Intel and Apple GPUs through Vulkan. Spirula Studio v2026.11.12 is available now for Windows, Linux and macOS under the GPL-3.0 license.
