[v4n4d1s]

There's no simple answer to your question.

It all comes down to your use case: Are you trying to learn game development or are you developing the next AAA-Title with hundreds of developers? Which platforms are you targeting? Are you willing to pay for the engine and/or the assets?

[OrphanDragon]

If it worth it - I will pay, why not? My goal is performance and we are going to have a pretty big map. Maybe the biggest ever...

[philippz]

Sounds like "Open World", then you might also want to take a look at Improbables "Spatial OS" - they raised ~550 mio.