Digital Preservation of Yungang Grottoes: Creating Permanent Digital Records for Ancient Stone Carvings

Located at the southern foot of Wuzhou Mountain in Datong, Shanxi Province, China, the Yungang Grottoes have stood for more than 1,500 years. As a UNESCO World Heritage Site and one of China’s four major grotto complexes, Yungang Grottoes contain 45 major caves and more than 59,000 Buddhist statues, representing one of the most significant achievements of ancient Chinese stone carving art.

After centuries of exposure to natural weathering and environmental changes, the grotto sculptures face various preservation challenges, including rock structure deterioration, surface peeling, and loss of fine details. How to comprehensively record the spatial structures, sculptural details, and historical information of these cultural treasures without affecting the original artifacts has become a key challenge in cultural heritage preservation.

Since the launch of its digital preservation program in 2003, the Yungang Research Institute has continuously explored new methods to protect and study grotto heritage through digital technologies. By integrating 3D scanning, digital modeling, and image acquisition technologies, Yungang Grottoes have gradually established a high-precision and systematic digital archive.

During this process, 3DeVOK, a cultural heritage and art-focused brand under SCANOLOGY, participated in the 3D digital acquisition project of Yungang Grottoes with the professional-grade 3DeVOK MT 3D scanner, providing high-precision 3D data support for cultural heritage digitization and preservation.

3DeVOK 3D Scanning Technology Supports Digital Acquisition of Yungang Grottoes

The core of Yungang Grottoes digital preservation lies in high-precision 3D data acquisition, creating accurate and reliable digital models for every sculpture and cave.

Facing challenges such as large-scale sculptures, complex structures, rich surface details, and strict preservation requirements, the 3DeVOK MT high-precision 3D scanner supports digital documentation in complex heritage environments through its non-contact scanning capability, high accuracy, and full-color 3D scanning technology.

Non-Contact 3D Scanning Protects Cultural Heritage Safety

The first priority of cultural heritage digitization is ensuring the safety of the original artifacts.

The 3DeVOK MT adopts a non-contact 3D scanning approach, capturing complete 3D data without touching the surface of the cultural relics, effectively minimizing potential risks caused by human intervention during the acquisition process.

For immovable cultural heritage such as grotto sculptures and stone reliefs, non-contact 3D scanning not only meets the requirements for accurate data collection but also provides a safer and more reliable approach for long-term preservation.

Up to 0.04 mm Accuracy, Precisely Recording Grotto Details

The folds of clothing, carving marks, and surface textures on grotto sculptures contain valuable historical information.

With accuracy up to 0.04 mm, the 3DeVOK MT can precisely capture the three-dimensional geometry of sculptures. Meanwhile, its color 3D scanning capability enables simultaneous acquisition of surface colors and textures, ensuring that digital models preserve both accurate spatial structures and realistic visual information.

Through high-precision color 3D data, researchers can comprehensively document Buddha statues’ shapes, carving details, and surface conditions, providing reliable digital references for future heritage research, conservation restoration, and digital exhibitions.

Lightweight and Flexible Design for Complex Heritage Environments

The interior spaces of grottoes are often limited and complex, requiring scanning equipment with high flexibility and adaptability.

The 3DeVOK MT features a handheld design and weighs only 620 g, making it lightweight and portable for data acquisition in different areas of the caves. Its strong environmental adaptability enables efficient scanning even under challenging on-site conditions.

Combined with the 3DeVOK Airgo wireless handle, the MT can also achieve wireless scanning, further improving operational flexibility and efficiency in complex cultural heritage environments.

From 3D Data to Digital Archives: Advancing Grotto Preservation

3D scanning is only the first step in digital preservation.

The high-precision 3D data captured by the 3DeVOK MT can be further combined with photogrammetry, texture optimization, and other digital technologies to create comprehensive 3D models containing spatial structures, geometric information, and surface details.

These digital resources can support:

Establishment of cultural heritage digital archives;

Monitoring and conservation research of grotto deterioration;

Digital exhibitions and public education;

3D replication and innovative cultural heritage applications.

Through the workflow of digital acquisition → 3D modeling → data preservation → innovative applications, Yungang Grottoes continue exploring new approaches to cultural heritage protection.

3DeVOK MT Empowering Digital Preservation of Cultural Heritage

The digital preservation practice of Yungang Grottoes demonstrates the important role of 3D scanning technology in cultural heritage protection.

From traditional surveying and photographic documentation to today’s high-precision 3D digital preservation, heritage conservation is evolving from two-dimensional records toward a more comprehensive digital approach.

With safe, accurate, and flexible data acquisition capabilities, the 3DeVOK MT high-precision 3D scanner helps establish reliable digital archives for grottoes, sculptures, and other cultural heritage assets, providing valuable data foundations for future research, conservation, and digital presentation.

Looking ahead, SCANOLOGY and 3DeVOK will continue exploring the applications of 3D scanning technology in cultural heritage digitization, helping more grottoes, sculptures, and historical artifacts establish high-precision digital archives and supporting the preservation and inheritance of global cultural heritage.