3rd person or mouse look fps walk over a sphere with gravity

How could one perform a gravity centre around a sphere akin to a player walking around it.

I have made a planet in maya but the gravity in some scripts is not quite correct.

I should probably clarify this problem a little more to gain interest.
I am happy for the end result to be on the u3d wiki as open source.
The idea is instead of flat terrains, you can work with a sculpted sphere internally with editor or imported from 3d external program.

Possible Future Software
Planet Sculptor

A spherical terrain editor
This could be expanded to a planet builder program.

Spherical maps avoid the wall collision limiter per zone.

Spherical maps create an island effect albeit a planet in space for loading maps.

A planet builder wouldn’t be that hard to make from the terrain builder features now. You could also add an atmosphere control panel and planet variables like gravity etc.

Anyway I do digress.
How would one find the gravity as well as 3d polygon collision height and angle pertaining to the mesh or spherical terrain.?

108333--4143--$planetmap_idea_584.jpg

has this been discussed before and I have missed that post?.
Any ideas would be great

Yep…do a search on faux gravity.

–Eric

thanks Eric.
I see there were issues with the poles etc.
I would have never thought of that at the start.

In case someone stumbles on this post, I think this is the link with all the fixes or at least a great head start.

http://forum.unity3d.com/viewtopic.php?t=9476