The engine is the core of the development system – it generates the 3D image and controls the behavior of the virtual world. Game Studio’s A7 virtual reality engine was developed in 2007. It’s new Adaptive Binary Tree scene manager switches seamlessly from indoor to outdoor sceneries. The brand new lighting engine overcomes the 8 lights limit of today’s 3D hardware and supports an unlimited number of static and dynamic shadow-throwing light sources. Programmers can use plug-ins for adding new effects and features. The simple and straightforward C-style DLL interface allows painless access to the engine from all programming languages.