Julius wrote:Yep, support is an issue...
But before switching to a completely closed engine, have a look at Torque3D, which is pretty nice these days and fully open-source. The new Linux port works also and the outdoor level editor build right into the engine is great.
Being open source is an issue. Paid engines have better support because, well, people get paid to support them. In FOSS world you are at mercy of the author/active developer. Any FOSS engine is a pet project, so authors are not going to implement what you need if it goes against their vision of the engine. Also, people tend to grow out of the development. Life goes on, circumstances come around and engine might no longer be in active development.
So the best thing is to either fork a FOSS engine and do all that you need yourself (or hiring/convincing to join your team dedicated engine programmer), or go with UE4/Unity (maybe Source 2 will be decent when it's out).