After several years of intense development we are proud to present a new 3D game engine, Volatile3D II. It was started in 2008 right after the first engine, Volatile3D, had been finished, and it was considered to be a free alternate to id Tech 4 engine. It might be not so fast, but comprises some original features, for example, soft shadows, parallax mapping, screen-space ambient occlusion, sun shafts, soft particles and so on. It might be not ideal, but we did our best to polish (well, to be honest) obsolete rendering techniques to produce a nice picture.
Certainly, this engine cannot compete with AAA monsters like UDK, Crysis and other. Furthermore, id Tech 4 is free and open-source nowadays. But we hope that this engine will also find its fans. Please note that proprietary license does not mean that you will never be able to use it. It does only mean that we don't expose the full source code to the public, but we are always open to negotiations if you'd like to use it in your game. Don't be ashamed to ask questions in comments or using a private messaging system if you must.
We plan to release a demo with several levels, but right now you can only get taste of screenshots and videos. Please don't judge it severely; note that the engine was programmed almost by one single amateur person at leisure time. :)