STACK
Go beyond a basic stack. Calibrate Light, Dark, Flat and Bias frames; process Deep-Sky and comet sequences; build star trails, long exposures and focus stacks; merge HDR brackets; and create single-row or multi-row panoramas.
Fusion Lab 2026
Calibrate, stack, blend, edit and export Astro and Landscape photography without moving your project between separate applications.
Fusion Lab 1.0 RC3 · 16 dedicated workflows · AIRI included · 16/32-bit processing · non-destructive projects
Go beyond a basic stack. Calibrate Light, Dark, Flat and Bias frames; process Deep-Sky and comet sequences; build star trails, long exposures and focus stacks; merge HDR brackets; and create single-row or multi-row panoramas.
Choose the editor built for the image in front of you. Develop RAW photography in Photo Editor or use Astro Editor for gradient extraction, stretching, color calibration, luminosity masks, star processing and targeted astrophotography adjustments.
Combine a tracked sky with a foreground through AI Astro Blend, refine alignment and masks by hand, then export for print or web with resizing, sharpening, watermarks and embedded ICC profiles.
One connected workspace
Fusion Lab keeps the entire job together: source files, processing parameters, previews and exported results. Move a result directly from stacking or panorama creation into Astro Editor or Photo Editor, save the workflow as a Fusion project and reopen it later.

Fusion Lab 1.0 RC3 · 7 August 2026
RC3 connects AI Astro Blend, Astro Editor, Photo Editor and Star Effects through the same precise geometry and mask logic—while expanding color science, XISF support and full-resolution AI processing.
RC1 and RC2 projects remain openable. Legacy model paths and geometry parameters are migrated automatically with safe fallbacks.
Local Masking keeps semantic Sky and Ground layers alive, synchronized and independently adjustable without creating duplicate masks.
Feathering, Ground Edge, per-layer erasing, exact mask preview and local Undo/Redo stay inside one modal editing session.
Eight-handle crop, photographic ratios, decimal rotation, ±90°, flip and straightening now behave consistently across four workspaces.
Astronomical white balance, star-based photometric calibration, chromatic-aberration correction and Sigma/MTF stretch strengthen scientific and visual accuracy.
Read, inspect and export UInt16 or Float32 XISF, including planar compressed attachments, byte shuffle and preserved scientific metadata.
Global ONNX contracts, reusable sessions and explicit full-resolution background subtraction keep corrected images, gradient maps and diagnostics aligned.
.xisf in file dialogs, associations and format registryRC2 · Build 3 — 30 July 2026
Astro Editor and Photo Editor now share the same masking workflow, visual language and local-editing logic.
Adjustments in the left column affect only the active selection. Clicking Done commits the complete masked edit as a single history state.
Graphics, mask layers, previews, Refine, Adjust and manual tools now behave consistently in Astro Editor and Photo Editor.
All Photo Editor adjustment families can be used with selections and masks. Switching or deleting a mask starts again from neutral local controls.
Brush+, Brush− and Eraser are smoother and accelerated on macOS and Windows, with precise local Undo/Redo from the very first click.
Fixed zero-opacity overlays, painting beyond image bounds, Darken Sky Background, slider resets and ONNX/CoreML stability.
Centered 1:1 zoom, Cmd/Ctrl + wheel, shared shortcuts, photographic guides and complete information bars across all four editors and viewers.
The Masks panel is cleaner and easier to scan, with unnecessary frames removed from slider rows.


Build 3 also improves work beyond the image edges, mask preview accuracy and local history reliability while keeping the editing pipeline non-destructive.
Fusion Lab 1.0 RC2
RC2 expands the editing workflow, strengthens non-destructive project safety and improves AI, RAW, FITS and cross-platform reliability.
Shared Astro/Photo masking with layers, Refine, Adjust, previews, local history and accelerated manual brushes.
Standalone Glow, diffraction-spike, Soft Flare and Ring Flare workflow with automatic or manual star selection and independent effect layers.
RAW temperature and tint, exposure, contrast, highlights, shadows, whites, blacks, texture, clarity, dehaze, vibrance, saturation and HLVG.
Visible future states, Undo/Redo and named snapshots now follow the Photo Editor model, with an isolated Starless baseline.
Play, Edit and Finish behave as one transaction. Undo truly returns to the previous state, while Cancel never contaminates the image.
Work is protected before a project is loaded, replaced or abandoned, reducing the risk of losing an active editing session.
Correct crop and canvas handling, more conservative registration, edge and star protection, halo suppression and photometric/chromatic matching.
As-shot metadata and white balance, highlight-safe AI White Balance, more robust temperature/tint and astro-safe handling of linear data.
Switch language at runtime without disturbing the project. Learn, FAQ, tooltips and AIRI include broader coverage.
CoreML CPU+GPU on Apple Silicon, ONNX CPU on Intel, DirectML on Windows, Unicode paths and more robust project saving.
Correct Astro Editor loading and ABI-consistent CFITSIO headers and libraries strengthen scientific-format compatibility.
New in RC2
Finish astronomical images with controlled, layered star effects—without leaving the Fusion Lab editing workflow.
Create Star Glow, diffraction spikes, Soft Flare and Ring Flare using automatic detection or precise manual star selection. Start with Essential controls, open Advanced parameters when needed, save presets and inspect the star mask or an Effects Only result in real time.

Meet AIRI · Web + Fusion Lab
AIRI understands the AstroPanel ecosystem, the Fusion Lab workspace you are using and the processing decision in front of you.
Use it inside Fusion Lab 2026 RC3 for context-aware guidance, or open the same assistant from your AstroPanel account when you are away from the application. AIRI access is included with your Fusion Lab license.

From Standard Calibration, Deep-Sky, Comet and Focus Stacking to Photo Editor, Astro Editor and AI Astro Blend, AIRI can explain controls, interpret visible issues and suggest the next useful check.
Recognizes the active editor, workflow and available project context.
Examines an optional reduced, metadata-free preview after consent.
Turns the current result into a clear sequence of checks.
Clarifies masks, stacking, color, export and Astro Blend parameters.
Links relevant documentation, guides, FAQs and release notes.
Activate or verify your Fusion Lab license, open Settings → AIRI, select Cloud service and start a conversation. AIRI can receive the active workspace, selected language and relevant help context so its answers stay specific to your task.
Sign in with the AstroPanel account connected to your Fusion Lab purchase, open AIRI and start a new conversation. Your recent web conversations remain available in the AIRI workspace.
When you attach an image, Fusion Lab or the browser prepares a reduced preview without metadata. The original file is never uploaded, the gateway does not retain the preview and the AI service key remains protected on the AstroPanel server.
AIRI analyzes, explains and recommends; it does not apply edits to the image. You review every suggestion and decide what to change. If the cloud service is unavailable, Fusion Lab's local Learn, FAQ and tooltips remain available.
Purpose-built imaging intelligence
Alongside the AIRI assistant, Fusion Lab includes two different AI imaging engines, each designed for a specific astrophotography problem.
Estimate and remove uneven illumination, broad color casts and low-frequency gradients without placing a manual sample grid. Inspect the proposed background model before applying it, then continue with stretch, color, masks and star processing in the same workspace.
AI Strength, Structure Protection and residual-gradient controls keep the correction reviewable and help preserve stars, nebulae and faint astronomical structure. Processing runs locally, while Polynomial and RBF extraction remain available as classical alternatives.
RC3 introduces persistent Sky and Ground layers inside Local Masking, with independent alignment, transform, feathering and edge controls plus a safer HOLD → Done workflow.
Sky/Ground selections, masks and transformations stay synchronized. Full-resolution 16-bit export, horizon protection, opacity, Adjust controls and complete Reset behavior are more reliable.
AI Background Extractor cleans and prepares the astronomical image; AI Astro Blend combines a finished sky with the landscape.
AI Background Extractor
Remove broad gradients and unwanted color from astronomical images while keeping the correction visible, adjustable and under your control.
AI Background Extractor estimates the low-frequency background separately from the astronomical subject. It is designed for difficult illumination patterns such as vignetting, light-pollution gradients and chromatic contamination, with Structure Protection helping retain stars, nebulae and faint detail.
The image is processed on your computer. Preview the estimated background, compare the original and current result, adjust the correction strength and continue inside Astro Editor without breaking the workflow.
Parameter scale comparison
Fusion AI Background V10 uses approximately 54 million trainable parameters. Across the model lineage, capacity expanded from 2 million parameters in V2 to 17 million in V5 and 54 million in V10, supporting progressively richer representations of spatial gradients, chromatic variation and astronomical structure.


STF applies an automatic Screen Transfer Function for display only. It reveals the background, faint signal and residual gradients without changing the underlying linear pixels — ideal for evaluating the extraction before committing to the next processing step.
MTF provides a controlled Midtones Transfer Function with an adjustable target background and sigma range. Use it to compare versions consistently and export a stretched, presentation-ready rendition when a visible result is required.
Background estimation and display stretching remain separate. Preserve or export the corrected linear master for continued scientific processing, and use STF or MTF only when you need a readable preview or a rendered output.
AI Background Extractor has been evaluated on held-out astronomical scenes across multiple gradient families. Results remain image-dependent; full-resolution visual inspection is always recommended before final export.
The complete toolkit
Open a category to explore the tools built for astrophotography, multi-exposure photography, editing and inspection.
Import and classify Light, Dark, Flat and Bias frames. Inspect calibration masters, preflight Light-frame quality and stack with Mean, Median, Winsorized Sigma Clipping or Linear-Fit Clipping.
Quality weighting, Drizzle 2×, rejection-map export, adjustable sigma, stellar registration, RGB balance and linear 16-bit or 32-bit TIFF output are included.
Calibrate optional Dark, Flat and Bias frames, align the Light sequence and combine it as LRGB, HOO, SHO/Hubble or RGB plus narrowband. Export 16-bit TIFF, 32-bit float TIFF or 32-bit float FITS.
Calibrate the sequence, detect the comet nucleus and register Light frames on its motion. Choose Mean or Median integration while preserving chronological capture order.
Combine a fixed-camera sequence with Lighten/Maximum, Mean, Comet Trail or Reverse Comet Trail. Smooth tapering creates a controlled bright head and fading tail.
Create Glow, diffraction spikes, Soft Flare and Ring Flare with automatic/manual star selection, Essential and Advanced controls, presets, masks, Effects Only output and a real-time preview.
Multiple layers can use different stars and effects, with independent visibility, order and opacity.
Blend a tracked sky with a foreground at original resolution. Automatic sky segmentation uses an ONNX model with a classical fallback; registration supports translation, similarity, affine, homography or local mesh warp.
Refine paired control points, positioning and masks; match exposure, color, local contrast and noise; protect stars; suppress halos; and choose edge-aware or multiband blending. The Quality Map identifies seam risk, doubled stars, halos, uncertain registration and noise discontinuities.
Estimate and remove uneven astronomical backgrounds with Structure Protection and an adjustable gradient-model preview. Use STF to inspect linear data without changing it, or MTF preview/export to create a controlled visible rendition. Polynomial and RBF extraction remain available as classical alternatives.
Continue directly from calibration or stacking into a dedicated astrophotography editor with Base/RAW development, stretch, color calibration, masks, Starless processing, history and layered star effects.
Align and average a tripod sequence to smooth water and clouds at full resolution. Choose Mean for a natural long-exposure effect or Median to reduce transient elements.
Merge the sharpest local detail from frames focused at different distances—designed for macro, product and landscape sequences.
Register repeated photographs of the same static scene and combine them with Mean or Median integration to reduce random noise.
Use Lighten/Maximum blending to combine the brightest pixels from multiple light-painting passes while preserving the fixed scene.
Align bracketed exposures through full-resolution exposure fusion. Select gentle, balanced or strong highlight recovery, work in 16-bit or 32-bit and start from 15 HDR looks.
Develop urban and suburban night brackets with dedicated highlight recovery, automatic exposure ordering and 32-bit tonal precision, then refine color casts, urban lights, structure, haze and gradients.
Find overlaps, estimate camera geometry and blend full-resolution photographs. Use Auto, Perspective, Cylindrical, Spherical, Collage or Fusion Pano Multi-row projection with Astro, Terrestrial and multi-row profiles.
Inspect correspondences, add control points, remove outliers, preview seams, normalize exposure and color, apply final RGB balance and choose Safe, Bounding or No Crop. Auto-stretch affects the preview only—not linear output.
Develop RAW photography with complete tonal and color controls, local retouching, luminosity masks, non-destructive history, snapshots and full-resolution professional export.

Editing and inspection
A complete photographic development environment with real-time preview, non-destructive history and full-resolution export. It combines conventional RAW development, local retouching and dedicated tools for monochrome and urban night photography.
A complete monochrome development section, not a simple desaturation switch. An eight-channel mixer controls how Reds, Oranges, Yellows, Greens, Cyans, Blues, Purples and Magentas translate into grayscale.
Refine the result with dedicated contrast, cool-to-warm toning and film grain. Natural, Portrait, Landscape and Dramatic Sky presets provide useful starting points while every channel remains adjustable.
Designed to finish night-photography brackets created by Fusion Lab's N-HDR merge, with targeted Yellow, Red and Magenta Cast controls. Urban Lights recovers color and detail in artificial lighting, Structure restores local definition, and Haze / Gradients controls atmospheric contamination and uneven illumination.
Use luminosity ranges, AI Sky/Ground selections, manual Brush+, Brush− and Eraser tools, ranges and combinations inside the same Masks workspace shared with Astro Editor.
Refine a selection, preview its overlay, then open Adjust to apply any Photo Editor adjustment family locally. HOLD / LOCKED limits the left-column development controls to the active selection, and Done records the complete edit as one history state.

A dedicated environment that brings Astro Background Extractor and the complete astrophotography finishing workflow together in Fusion Lab.
RC2 corrects FITS loading inside Astro Editor and aligns CFITSIO headers and libraries at ABI level. Unicode paths, autosave and project persistence are more robust across supported platforms.

Open supported photographic and scientific formats with metadata, zoom and inspection tools before choosing the next workflow.
Quality before rendering
Analyze star count, FWHM, eccentricity, SNR, clipping, color casts and motion. Every frame receives a quality score and a conservative keep/reject recommendation.
Inspect master Bias, Dark and Flat statistics, defective pixels, illumination, vignette maps, defect maps and compatibility warnings.
Validate overlap and geometry without composing the full panorama, with confidence, inliers, seams and corrective actions recorded in the diagnostic log.
Professional output
Export JPEG, PNG, 16-bit TIFF or 32-bit float TIFF. Resize to a target width, sharpen the output, position a PNG watermark, control JPEG quality or maximum file size, and convert to sRGB, Adobe RGB (1998), ProPhoto RGB or Display P3 with the ICC profile embedded.
Scientific workflows can remain linear; Deep-Sky also supports 32-bit float FITS.
Bounded previews, cancellable jobs and memory-aware execution keep large imaging projects under control. The persistent queue processes demanding jobs sequentially and safely restarts interrupted work.
Selected operations use Metal acceleration on supported Apple systems. Compatible AI models run through ONNX Runtime, with classical fallbacks where available.
The complete bundle
Fusion Lab brings capture preparation, stacking, photographic development, astrophotography processing, AI tools and professional delivery into one license and one non-destructive project environment.
Dedicated workflows in one bundle.
Instead of moving files between separate stacking, panorama, RAW, astronomy and export applications, Fusion Lab keeps the complete image pipeline connected.
Release & compatibility
Download RC3 now for Windows 10 / 11 x64, macOS Apple Silicon and macOS Intel.
RC3 is available now for supported 64-bit Windows 10 and Windows 11 systems, with DirectML acceleration on supported hardware.
RC3 is available now for macOS 13 or later, with verified Apple Silicon and Intel packages, CoreML CPU+GPU on Apple Silicon and ONNX CPU on Intel-based Macs.
If you have already purchased Fusion Lab, download the version currently available for your platform from your Account page.
Fusion Lab 2026
Spend less time moving files between applications and more time refining the result—from calibrated frames to an image ready for web, print or the next creative stage.