The Ultimate Guide to Turn DGN Files into SimReady USD Content

This guide is part of the RapidPipeline 3D Formats Knowledge Database.

DGN (Design File) is the native file format of Bentley MicroStation, a CAD software application primarily used for architecture, engineering, construction, and infrastructure projects. DGN files can store 2D and 3D geometry, including complex designs for buildings, roads, bridges, and utilities. The format supports precise coordinate systems, extensive annotation capabilities, and detailed metadata. DGN is particularly strong in civil engineering and infrastructure applications, with support for geographic coordinate systems and large-scale projects. Modern DGN files are based on an open specification and can be read by various CAD applications. It is a file format mostly used for CAD and infrastructure design data.

USD (Universal Scene Description) is the primary format to generate SimReady data, enabling 3D assets to be used in simulation environments such as NVIDIA Omniverse, PhysX, and more. For this to work properly, USD assets must adhere to the USD standard, and ideally bring metadata that helps to inform downstream simulation use cases about various simulation-relevant properties of the 3D asset.

There are various ways to generate USD files, but especially when starting from non-simulation formats like DGN, it is not easy to perform a good conversion. Additional required steps might include material assignment (in case realistic materials are desired) and related steps like UV generation, but also metadata transfer from the original file to the final SimReady USD asset.

With RapidPipeline, the process of generating NVIDIA SimReady USD content from DGN files is easy:

1. Download RapidPipeline Twin Studio, or one of the RapidPipeline 3D tool plugins (free trial available). Alternatively, you can also use RapidPipeline directly in the browser.
2. Perform the conversion from DGN to USD. Store or download the resulting USD file, it's ready to use!
3. If you'd like to scale up the process, simply get in touch to acquire a license for the RapidPipeline 3D Processor, running as powerful batch processing tool that turns your entire library of DGN files (or other files) into SimReady USD content.

Here is the link for more details.

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