3D Expert Co.,Ltd. announces a major release of its desktop application, bringing BCF-based issUe tracking, GIS-BIM fusion, and cross-format data export to engineering teams worldwide — with a generous free tier included.

OSAKA, Japan — June 2026 — 3D Expert Co.,Ltd., a global provider of web-based 3D/BIM/CIM/GIS lightweight rendering technology, today announced a significant update to 3D Model & Data Asst, its free Windows desktop application for viewing, inspecting, and working with professional 3D engineering models.

The release introduces Issue Collaboration — a new capability that enables teams to annotate, track, and resolve design and construction issues directly on 3D, BIM, and GIS models, with export to industry-standard BCF format for round-trip workflows with authoring tools — alongside expanded 3D-BIM-GIS fusion capabilities that bring geospatial context into engineering review.

What Is 3D Model & Data Asst?

3D Model & Data Asst is a native Windows desktop application (Windows 10/11 Pro, Enterprise) that lets engineering, construction, and infrastructure teams open, explore, and work with 30+ professional 3D Model Formats — locally, offline, with a generous free usage tier.

It is built on 3D Expert's proprietary lightweighting engine, which uses multi-level dynamic loading to handle large-scale models on standard office hardware. No GPU workstation required. No cloud upload necessary.

Core capabilities include:

• 30+ Format Support — Revit, Bentley MicroStation, Tekla Structures, Navisworks, SolidWorks, IFC, FBX, STEP, 3DXML, SketchUp, and more — plus 9 dedicated CAD plugin exporters for the highest-fidelity data extraction
• Geometry + Data — View not just the 3D shape, but every material property, structural relationship, attribute field, and classification code that makes BIM valuable
• Custom Structure Trees & Attributes — Reorganize the model hierarchy to match your workflow and add custom property fields to any component
• Measurement, Sectioning & Viewpoints — Essential inspection tools for quantity takeoff, clash review, and design coordination
• Generous Free Tier — A fully capable free usage tier with no time limit; upgrade for extended capacity

New: Issue Collaboration — Annotate, Track, Resolve

The standout feature of this release is Issue Collaboration, a built-in workflow that turns 3D Model & Data Asst from a viewing tool into a coordination platform.

Model-Based Issue Markup
Users can place issue markers directly on 3D, BIM, or GIS model components, attaching descriptions, screenshots, severity levels, and assignee information. Every issue is spatially anchored to the model — no more ambiguous "column near the east stairwell" descriptions.

Structured Issue List
All issues are collected in a filterable, sortable issue register within the application. Teams can review open items by status, priority, location, or assignee — providing a single source of truth for model-based coordination.

BCF Export — Round-Trip to Authoring Tools
Issue data can be exported to the BIM Collaboration Format (BCF), an open, vendor-neutral standard supported by Autodesk Revit, Navisworks, Tekla Structures, Solibri, and dozens of other BIM applications. This enables a complete round-trip workflow:

Capture an issue in 3D Model & Data Asst → Export as BCF → Open in Revit → Fix the design → Re-export → Verify the fix in 3D Model & Data Asst.

No manual transcription. No lost context. The model is the communication medium.

PDF Issue Report
For stakeholders who don't work inside a BIM tool — project managers, clients, field supervisors — all issues can be exported as a formatted PDF report, complete with issue IDs, descriptions, statuses, snapshots, and assignee information. Ideal for progress meetings, snag lists, and contract documentation.

GIS + BIM Fusion: Engineering in Context

3D Model & Data Asst also brings geospatial context into the engineering workspace with deep GIS integration:

Full-Spectrum GIS Data Support

Coordinate System Intelligence
The application performs automatic conversion between Cartesian engineering coordinates and geographic coordinate systems, including WGS84 (EPSG:4326) and major regional projected coordinate systems. BIM models designed in local project coordinates are automatically aligned to their real-world geospatial position — no manual georeferencing step required.

Seamless Fusion
3D/BIM models and GIS data layers are rendered together in a unified viewport. A bridge model appears on its actual terrain. A plant layout sits on real satellite imagery. A city-scale digital twin combines underground utilities, above-ground structures, and oblique photography in one view. The fusion is automatic and visually coherent.

GIS-Standard Format Export
Models can be exported from 3D Model & Data Asst to GIS-native delivery formats, including 3DTiles (b3dm, i3dm), S3M, and SLPK (i3S) — making the application a bridge between design-authoring BIM environments and geospatial digital twin platforms.

Format Conversion Hub

Beyond viewing, 3D Model & Data Asst serves as a cross-format conversion tool, outputting models in eight standard formats:

Conversions are processed locally — no data leaves the user's machine — and include optional Draco mesh compression and vertex merging for optimized delivery.

Why It Matters

The AEC industry generates enormous volumes of 3D data, but accessing that data has historically required either the original authoring software (with its cost and training burden) or cloud upload platforms (with their bandwidth, latency, and data sovereignty concerns).

3D Model & Data Asst addresses this by putting a capable, fast, locally-running viewer on every engineer's desktop — with a free tier that covers substantial usage. The addition of Issue Collaboration extends this from a solitary viewing experience to a team coordination tool, while GIS fusion makes it relevant to infrastructure and geospatial workflows that span far beyond a single building site.

Key value propositions at a glance:

• 🔒 Local & Offline — No cloud dependency, no data upload, full privacy
• 💻 Standard Hardware — Runs on ordinary office PCs, no GPU workstation required
• 🆓 Generous Free Tier — Full-featured free usage tier with no expiration
• 📐 30+ Formats — From Revit to point clouds to oblique photography
• 🏷️ Issue Collaboration — BCF and PDF export for model-based coordination
• 🌍 GIS Fusion — Automatic coordinate system conversion and geospatial alignment
• 🔄 Format Conversion — Output to 3DTiles, S3M, SLPK, glTF, and more

Availability

3D Model & Data Asst is available for immediate download at:
https://www.opt3ds.com/3d-model-data-asst/

System Requirements: Windows 10 Pro/Enterprise or Windows 11 Pro/Enterprise.

The application is available with a generous free usage tier. Full plugin exporters for Revit, Bentley MicroStation, Tekla Structures, Navisworks, Inventor, SolidWorks, PDMS, SP3D, and AutoCAD are available at https://www.opt3ds.com/3d-bim-plugin/.

About 3D Expert Co.,Ltd.

3D Expert Co.,Ltd. is a global technology provider specializing in web-based 3D, BIM, CIM, and GIS lightweighting and high-performance rendering. The company's product portfolio includes 3D Model & Data Asst (desktop viewer), Rapid3D Loader for Three.js (web rendering SDK, available as the npm package opt-rapid3d-loader), 3D/BIM Plugin (9 dedicated CAD exporter plugins), and Opt File Generator (desktop format converter). Headquartered in Osaka, Japan, 3D Expert serves engineering, construction, and infrastructure organizations in over 20 languages across global markets.

Website: https://www.opt3ds.com/
Contact: info@3dexpert.jp

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