Is it possible to create sphere worlds, like the small planets is Spore? Or like this game: [link I have no idea, where to start, or even if it is possible somehow. The gravity should point to the center of the sphere (planet), and the heightmap should be applied to a sphere somehow, and the charac…

It is but you will require to create a custom gravity vector instead of using the build-in engine gravity. Here is a forum thread about how to do it and to get you started: Dynamic gravity for characters - C++ - Unreal Engine Forums You gravity vector would then point into the sphere.

Is it possible to create sphere worlds in UE4?

Development World Creation

Phim (Phim) January 5, 2016, 12:01pm 12

The pull request you mentioned is the #1773 (status open)?