Open Source C# 3D Rendering Software

The Irrlicht Engine is an open source high performance realtime 3D engine written and usable in C++. It is completely cross-platform, using D3D, OpenGL and its own software renderers.

Helix Toolkit is an open source 3D library that is licensed under the MIT license. The MIT license is very permissive and permits use in proprietary software. The library is based on .NET and is currently focusing on the WPF platform. The goal has been to make it easy to work with 3D in WPF, and also provide features that are not included in the standard WPF 3D visual model. Adds variety of functionalities/models on the top of internal WPF 3D models (Media3D namespace). dds variety of functionalities/models on the top of internal .NET Core WPF 3D models (Media3D namespace). Custom 3D Engine and XAML/MVVM compatible Scene Graphs based on SharpDX(DirectX 11) for Universal Windows App. Custom 3D Engine and Scene Graphs based on SharpDX(DirectX 11) for netstandard and .NET Core. Custom 3D Engine and XAML/MVVM compatible Scene Graphs based on SharpDX(DirectX 11) for WinUI 3 (Project Reunion - experimental).

glTFast enables use of glTF™ (GL Transmission Format) asset files in Unity. It focuses on speed, memory efficiency, and a small build footprint while also providing 100% glTF 2.0 specification compliance. glTFast supports the full glTF 2.0 specification and many extensions. It works with Universal, High Definition, and Built-In Render Pipelines on all platforms. Move or copy glTF files into your project's Assets folder, similar to other 3D formats. glTFast uses custom shader graphs that you have to include in builds in order to make materials work. If materials are fine in the Unity Editor but not in builds, chances are some shaders (or variants) are missing.

NaroCAD is a fully fledged and extensible 3D parametric modeling CAD application. It is based on OpenCascade.

OpenArena is a 3d game creation engine. It is a rendering system that can be used for more than just games but it is targeted at games. The basic use being create some game media textures models maps and config files for physics and rules.

Open-source, cross-platform 3D rendering engine for .NET and Mono. The Axiom Engine is a high-performance C# port of the powerful OGRE engine and provides full support for DirectX, OpenGL and XNA on Windows, Linux, Android, iPhone and Windows Phone.

As of 2012-10-02, the well-known Tao project became officially abandoned and superseded by another project called OpenTK. However, since OpenTK follows a different way than Tao did, this project tries to carry on with the original design and ideas, but with cutting edge features. The ultimate goal is to have a 1:1 OpenGL binding for .NET, which supports OpenGL 4.x. The project tries to keep as much of the original goals as possible, including licensing, etc.

A 3D graphics engine for use in 3D games and other real-time rendering applications using managed code (C#) and the .NET framework and supporting both the OpenGL and Direct3D APIs

GLTF/GLB Windows Shell Extension: This shell extension automatically adds thumbnail images to .glb files in Windows File Explorer and provides a right click menu option to generate a 3D preview image for .gltf files. Supports multi-file select and directory processing. Pre-built Windows x64 installer available at https://buymeacoffee.com/nathancrews/e/255640 LAS/LAZ Pointcloud Windows Shell Extension: This "quick viewer" shell extension provides a Windows File Explorer right click menu option to quickly generate 3D preview images for large and small .las and .laz files. (Disclaimer: Processing time depends on compute hardware) Typical processing time for 100mb .las is about 2 seconds. 25mb .laz file process in about the same times. Files are processed in parallel using available CPU cores. Pre-built Windows x64 installer available at https://buymeacoffee.com/nathancrews/e/255641

VTK.NET is a .NET wrapper for the Visualization Toolkit. With it, you can write Windows Forms applications in C#, managed C++, Visual Basic, or J#. It includes a Windows Forms Control for drag and drop design of forms.

The first 3D game engine built in C# for .NET, predecessor to the Visual3D Game Engine (https://www.poweraccess.net/visual3d-game-engine), an All-in-One Game Development Tool for Next-Gen 3D Games, MMOs, Simulations and Virtual Worlds powered by Microsoft XNA.

A cross-platform terrain rendering engine that uses advanced techniques such as dynamic tessellation to render complex landscapes at high frame rates. Suitable for use in games, engineering, simulation, etc.

ClutterFlow is a CoverFlow clone for the Banshee media player. ClutterFlow uses the Clutter toolkit to harness the OpenGL powers. For more info: http://gitorious.org/banshee-community-extensions/pages/ClutterFlow

3DProS is a programming tool. It helps people create 3D animations, design custom 3D controls and solve lots of graphic problems easily, just by drag and drop. Besides a built-in language called MathScript, it also supports Free Pascal and MinGW C++

Icarus Scene Engine is a cross-platform, CLS-compliant 3D framework, integrating open source APIs into a cohesive all-open-source, all .NET solution. For Windows, MacOSX & Linux. Uses OpenTK, OpenGL, OpenAL APIs for graphics and audio. Runs on Mono/.NET. Links to FFMpeg for streaming video, and FreeType as a temporary conversion mod to bring fonts into a native XML format. Binary builds of Icarus will be infrequent, roughly every 18 months or so, the GIT code updates regularly on a weekly or twice-weekly basis (or faster if there are urgent issues).

ColladaLoader is a free open source C# Library that enables developers to load and display Collada 3D Model files (.DAE) in DirectX 10 using the SlimDX SDK. Partitial .X file support. More info: http://www.tomsdevshack.be/projects/colladaloader

UPDATE 2014-06-01: As there are still lots of weekly downloads I need to clarify the TXna status. The Xna 3.1 based version is no longer developed, there are no commits for over two years. Instead a port to MonoGame is in progress. Please use the TXnaGE from the \branches\monogame folder! The monogame version is based on mongame 3.2.2 and has most of TXna features except: shadowmapping, modelscenenodes and instancing - those features are in development! Titanium Xna Game Engine is a Xna 3.1 based game engine written in c#. Complex scenes can be build in just few lines of code. The developer is free to combine TXna features and standard Xna techniques without any limitations. Please use the svn checkout or update feature to get the latest source and compile from source. The engine is not released frequently but only after major source updates. Chances are that by downloading a release you will get a rather old copy.

V3D-Viewer is a Dicom and "Philips V3D 3DRA" Medical Volume Viewer based on .Net and the VTK library. With marching cubes, 3d planes and (3D texture) volume rendering, including histogram transparency and intensity curve selection tool.

2licht's aim is to provide a collection of wrappers for the popular Irrlicht Engine (http://irrlicht.sf.net/). It is still in development; the first wrappers to be released will be the C and Object Pascal interface; followed by a .NET library.

This is project is created to perform boolean operation using DirectX 9.0 with .NET 2.0 and other supported dlls. This is not a final build as i am working on the same. -- The suggestions are always welcome. Thank You.

ATOM3D.NET is a Realtime 3D Game Engine thats inded to support everything needed to create games. A3D.NET will support Graphics through OpenGL and DirectX, Sound, Network, Physics, GUI and more. A3D.NET is a complete state of art game engine.

ActFX is a 3D engine written in C # using XNA and Framework.NET ActFX è un 3D engine scritto in C# utilizzando XNA e il Framework.NET

This was going to be a 3D CRPG written in c++, now it will probably be some sort of CRPG written in C# with DriectX 9.

Intended to be a cross-platform 3D engine and toolkit using the Tao framework and allowing C#/F#/.NET developers to target Mac OS X and Windows with a single build. Also includes accessory tools for managing builds and ports of your game product.