It gonna be tough to deform a flat landscape into a spherical one. Boom boom's suggestion may work to a degree but you're likely to get issues at edges unless it's a tilable heightmap.
If you need it to be spherical I'd recommend using a geosphere where the vertices are uniformly spread over the surface of the sphere then use a similar method to birdie's ( define and arbitrary plane and extrude points in front of the plane ) to get a landscape effect.
What is it you're making? There will likely be better methods.
Stevie
If you need it to be spherical I'd recommend using a geosphere where the vertices are uniformly spread over the surface of the sphere then use a similar method to birdie's ( define and arbitrary plane and extrude points in front of the plane ) to get a landscape effect.
What is it you're making? There will likely be better methods.
Stevie