With software like Blender as well as products like InstantReality, 
X3D as a markup for 3D scenes makes for a viable alternative 
to the COLLADA XML dialect and other 3D formats and engines. 
In addition to the realtime rendering capabilities of a typical X3D engine, 
X3D serves as a good abstraction, an interchange, 
bundling all the concepts of a modern realtime engine 
into one package that is very programmer friendly. 

There is a future where all Mixed Reality applications 
will be based on a converged 3D standard. 
We believe this standard is X3D Extensible 3D Graphics 
furthering development of standardised Mixed Reality interfaces 
for the web, mobile, and desktop platforms. 
This engine is focusing on this space and will be multiplatform.

"X3D is used for building 3-dimensional models, both simple and sophisticated, 
X3D can show animated objects from different viewpoint perspectives, 
allowing user insight and interaction. 
X3D models can be further combined and connected to build sophisticated 3D virtual environments 
running across the Internet." (Brutzman and Daly, 2007)

A copy of the OpenTK library ships along as the engine uses it at the moment as a wrapper to OpenGL. 
Currently we're a bit low on documentation 
there are included a few X3D examples 
pulled from a few X3D content developers across the world wide web.

This is currently no full X3D framework .. Imao there is no X3D browser that currently supports the entire v3.3 spec 
However, this C# codebase is focusing on implementing the rendering component properly 
and nailing down X3D Core early so the project's foundations adhere to the spec more thoroughly longterm.

This project is the current source there is an earlier prototype of the project 
archived on Google Code from 3 years ago which was written using the classic OpenGL v2.0 API. 
All that was done in the original prototype has been replaced with a lighter more customisable OpenGL 4.0 compatible engine and GLSL shader code. 
This is why the project here on github serves as the current most up to date version, 
and will likely be better than other X3D browsers available today noted that I take my hat off to X3DOM.
There's experimental code released of which I try and keep as stable as I can for each commit, however no guarantees that the project is bug free. I am playing with lighting and prototyping - an area in the engine which is unstable at the moment. 
The latest source code may be checked out using " git clone https://github.com/RealityDaemon/x3d-finely-sharpened "
Use Visual Studio 2015 for development and compilation.

COMPLETED: URL/URI/filesys/CDATA/data:text/plain assett & resource fetching (partial URN support)
COMPLETED: X3D XML Scene Export (b3ec3a7)
MOSTLY: abstract types defined according to X3D 3.3 spec, see x3d-3.3.Designer.cs
MOSTLY: Viewpoint and ViewpointGroup implementation and decent-scalable Camera model. (Support for Fly, and Examine)
MOSTLY: Scripting using JavaScript (JIT compiled using the V8 Engine)
MOSTLY: DEF and USE
PARTLY: Write support for X3D-B Binary Compression/Decompression
PARTLY: Scene Graph Debugger; we want to add console UI for script engine here, as well as make node & attribute editing widgets, upgrade any old code
TODO: Implement float[], double[], int[], compressors for X3DB support
TODO: Write simple UI frontend for import/export X3D-B Binary in ConstructionSet in WPF
PARTLY: Background, MultiTexturing, CubeMapping, ..
PARTLY: X3D Validation and invalid node pruning (Applied on the fly in the Runtime)
TODO: Node Prototyping
PARTLY: grouping
PARTLY: event propagation between X3D nodes and their fields, and any shader uniforms
PARTLY: event graph and event thread processor setup for a given scene graph as well as events firing once per timestamp
TODO: networking: inline, import, export, etc
TODO: Rigid Body Physics component library: Apply forces of different types; accelerations, force impulses, velocity changes, classic forces of mass

TODO: Collision on planes and solid geometry 
PARTLY: scene graph and event graph models
PARTLY: transformations, and better conformance with standard
PARTLY: all texturing related nodes esp. TextureProperties, and refactor ImageTexturing
TODO: animations & interpolators and VW timing
PARTLY: X3D Materials interpolated with textures optionally with lighting
TODO: lighting; phong shading, lit and unlit models
TODO: Navigation component; LOD, Billboard, Collision, ..
TODO: Binary space partition, BVH, or Octtree optimisations
TODO: Raycasting engine component
PARTLY: geometry nodes
PARTLY: shaders
TODO: Simple volume rendering using slices fetched from sets of image files e.g. *.png, *.jpg
TODO: volume rendering using either: vox or nrrd formats or whatever will be defined by ISO
PARTLY: SceneGraph rendering; DEF_USE, event graph, prototypes, routing fields and shader uniforms
TODO: documentation
TODO: complete range of X3D examples covering all node usages and test cases

A library implementing the X3D 3.3 specification, frugal by design, with no platform specific boundaries, 
for the render of; interactive X3D Scenes, that can be accessed/modified by whichever scripting language is present in the platform.

New BSD Licence

Copyright © 2013 - 2016 the x3d-finely-sharpened project, Mr Gerallt G. Franke Melbourne/Tasmania, Australia

All rights reserved.

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

* Neither the name of the library nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED. IN NO EVENT SHALL MR GERALLT G. FRANKE BE LIABLE FOR ANY

DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.