The great thing about the engine is that it makes everything on spot. You import a model - it automatically creates a physics calculation for it, it also doesn't create just so called "physboxes" which means that every single polygon of the model is also a polygon for physics calculations. The same applies to lighting, everything is automatically calculated like shadows and stuff. The engine has randomly generated volumetric clouds and other cool stuff. The problem I see with it - Oh, it has this, this and that. Now, how does the game differ from other games where you can hack and slash and use physics?
