wouldn't treating everything as a flat world and curving it afterwords be easier than having to build the world as a sphere? Especially since the amount of curvature wouldn't be tied to the size of the world. That minecraft mod seems to sit on top of everything pretty fine: http://youtu.be/TKw18P65A2s
How does applying a spherical gravity force change how the physics engine works. Physics engines handle collisions between objects. It doesnt matter where those objects are or what is "up". Why does a spherical world mean you want spherical raycasts? Thats not realistic and its just weird. If you want everything to…