Formats

Remix utilizes Omniverse’s standard USD (for scenes) and MDL (for materials) file formats. Most content used in Omniverse needs to be converted into one of those standard formats so that your file can be used universally among the applications being used within the platform. You can view the Omniverse Format documentation to read further details about file formats and format conversions.

Asset Converter

Apps in Omniverse are loaded with the Asset Converter extension. With it, users can convert models into USD using the Asset Converter service. Below is a list of formats it can convert to USD.

Level	Operating System	CPU	CPU Cores	RAM	GPU	VRAM	Disk
Min	Windows 10/11	Intel I7 or AMD Ryzen	4	16 GB	GeForce RTX 3060Ti	8 GB	512 GB SSD
Rec	Windows 10/11	Intel I7 or AMD Ryzen	8	32 GB	GeForce RTX 4070	12 GB	512 GB M.2 SSD

Extension	Format	Description
.fbx	Autodesk FBX Interchange File	Common 3D model saved in the Autodesk Filmbox format
.obj	Object File Format	Common 3D Model format
.gltf	GL Transmission Format File	Common 3D Scene Description
.lxo	Foundry MODO 3D Image Format	Foundry MODO is a type of software used for rendering, 3D modeling, and animation.

Materials

NVIDIA has developed a custom schema in USD to represent material assignments and specify material parameters. In Omniverse, these specialized USD’s get an extension change to .MDL signifying that it is represented in NVIDIA’s open-source MDL (Material Definition Language).

DL Texture Formats Accepted

MDL Materials throughout Omniverse can accept texture files in the following formats.

Extension	Format	Description
.bmp	Bitmap Image File	Common image format developed by Microsoft.
.dds	DirectDraw Surface	Microsoft DirectX format for textures and environments.
.gif	Graphical Interchange Format File	Common color constrained lossless web format developed by CompuServe.
.hdr	High Dynamic Range Image File	High Dynamic Range format developed by Industrial Light and Magic.
.pgm	Portable Gray Map	Files that store grayscale 2D images. Each pixel within the image contains only one or two bytes of information (8 or 16 bits)
.jpg	Joint Photographic Experts Group	Common “lossy” compressed graphic format.
.pic	PICtor raster image format	DOS imaging standard mainly used by Graphics Animation System for Professionals (GRASP) and Pictor Paint.
.png	Portable Network Graphics File	Common “lossless” compressed graphics format.
.ppm	Adobe Photoshop Document	The native format for Adobe Photoshop documents.

USD File Formats

Universal Scene Description (USD) is a versatile framework designed to encode data that can be scaled, organized hierarchically, and sampled over time. Its primary purpose is to facilitate the exchange and enhancement of data among different digital content creation applications.

Extension	Format	Description
.usd	Universal Scene Description (Binary)	This is the standard binary or ASCII file format for USD. It stores the 3D scene and asset data in a compact, binary form, making it efficient for storage and processing.
.usda	Universal Scene Description (ASCII)	This format stores USD data in a human-readable, ASCII text format. It's primarily used for debugging and as a reference because it's easier for humans to read and modify. However, it's less efficient in terms of file size and loading speed compared to the binary format.
.usdc	Universal Scene Description (Crate)	This is a binary format for USD, but it's optimized for high-performance data storage and retrieval. .usdc files are typically used as the primary format for asset storage and production pipelines, as they offer faster loading and saving times compared to .usd files.

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