KIRI Engine 4.0: Major Updates in Photogrammetry and AI-Powered PBR

Photo Scan mode in KIRI Engine is powered by our cutting-edge photogrammetry technologies, it has been one of our most popular features, but we knew it could be better. In this latest update, we are focusing on improving the photogrammetry and the Photo Scan Mode in KIRI Engine.

Limitations of previous Photo Scan Mode

Photogrammetry is a proven and widely adopted technique, but its performance depends heavily on the surface texture of the object.

Subjects with clear patterns and rich details typically generate stable, accurate scans, whereas smooth or low-texture objects may lack sufficient feature points, often resulting in incomplete or unstable reconstructions.

Photo Scan's Major improvements in KIRI Engine 4.0

Lower Texture Requirements

Even low-texture objects can now be captured more reliably, reducing common failures seen in previous versions.

Comparison on low-texture objects

More Stable Results

The new Photo Scan Mode delivers improved surface quality, producing cleaner and more accurate 3D reconstructions.

Kiri Engine 4.0 delivers higher surface quality

5x Faster Processing

The processing speed in Photo Scan has increased by up to five times, it has been reduced from nearly 10 minutes to around 2 minutes, significantly improving efficiency.

Expanded Photo Upload Limits

Providing more high-quality images generally leads to better reconstruction. With KIRI Engine 4.0, the upload limits have been increased:

• KIRI Engine Basic: 100 → 150 photos

• KIRI Engine Pro: 300 → 500 photos

This enables capturing more perspectives and achieving higher-quality scans.

New AR Mode

When enabled, AR Mode shows each captured photo as a 3D camera icon in space, helping users track coverage and ensure all angles are captured.

Shows coverage and ensures full angle capture

Unlimited Scans and Exports for Free Users

Previously, KIRI Engine Basic users could enjoy unlimited scans with Photo Scan but were limited to three exports per week. With this update, free users can now also enjoy unlimited exports, making KIRI Engine a truly sustainable tool for long-term use.

AI-powered PBR Material Capturing

KIRI Engine 4.0 introduces a new PBR training algorithm. For the first time in 3D scanning, the KIRI Engine can generate professional-grade PBR materials using a diffusion model — the same technology that powers modern AI image generation. This breakthrough enables capturing more realistic and physically accurate textures directly from scans.

PBR in 4.0 is cleaner, smoother, and more realistic — powered by our new AI-driven algorithm

Full-res In-app Rendering & Texture toggle

Previously, KIRI Engine displayed only low-poly previews on mobile devices. With KIRI Engine 4.0, a new compression algorithm enables full-resolution 3D models to be rendered directly on mobile, and users can now freely toggle textures on or off for better mesh inspection.

You can now toggle textures on or off — inspect the full mesh structure directly on your phone.

Learn More & Join the Community

To find out more, visit us at https://www.kiriengine.app/

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Try the KIRI Engine now for free:

Download KIRI Engine on Google Play Store: https://play.google.com/store/apps/details?id=com.kiriengine.app

Download KIRI Engine on App Store: https://apps.apple.com/us/app/kiri-engine-3d-scanner-lidar/id1577127142

KIRI Engine WEB Version: https://www.kiriengine.app/webapp/