3DUNDERWORLD-SLS vs RealityScan

3DUNDERWORLD-SLS is a free Linux project that reconstructs point clouds from camera image sequences illuminated by patterned light. Its structured-light process has CPU and GPU implementations, and the command-line program can save reconstructed models as PLY or OBJ files. Version 4.x requires two or more cameras and provides a generic camera interface that programmers can extend. Camera acquisition is not implemented, so users must supply a camera class through the provided interfaces. The project accepts camera image folders, calibration files, and a patterned-light projector as inputs. It does not provide real-time capture or mesh reconstruction. Libraries are included for integration into other projects, with CPU and GPU examples, and an API was included in OpenCV 3.1 for a stereo approach using time-multiplexing Gray encoding. The repository supplies demo binaries, example data, and CMake build instructions. Dependencies are OpenCV 2, CUDA 6.0 or later, and glm. CUDA detection enables CPU and GPU constructors; without CUDA, only the CPU constructor is generated.

RealityScan creates detailed 3D models from images and laser scans using photogrammetry. Its desktop software provides an end-to-end pipeline for high-fidelity photorealistic models and precise point clouds at any scale. Listed tools include cleanup and optimization, image layers, scalable worldbuilding workflows, and workflow automation. RealityScan Mobile adds real-time point-cloud feedback, automatic capture, augmented-reality scaling, camera controls, and masking. Mobile models can be uploaded to Sketchfab or exported to the device for use in other 3D software. The mobile app is free on iOS and Android. Desktop installation requires the Epic Games Launcher and an Epic Games account; listed operating systems include 64-bit Windows 8/8.1/10/11 or Windows Server 2008+, and Ubuntu 24.04 or Fedora 39. Individuals and small businesses below $1 million USD in revenue in the past 12 months, educational institutions, and students can use the product for free. Other seats cost $1,250 a year and include updates for one year. A 30-day trial is available, with tutorials, guides, documentation, sample datasets, and community forums provided.