[Help] Heightmap smoothing

[BloodBane611]

I've got a heightmap that looks like this (at 200% in photoshop):



Ingame that's creating terracing, which you can see in this pic:



It's a 4km map, I'm not that interested in hand editing all of those out..... Any ideas? Specifically thinking I need some photoshop guidance, I've lost my all my photo-fu in the 2 years I put it on the shelf.

[Amok@ndy]

did you follow the tut i send you in all steps ?
i would guess it has sth to do with the size of your heightmap

[space]

The height map should be 16bit.

[Amok@ndy]

thats exactly what i thought

[BloodBane611]

Well that's embarassing....

Thanks gents, that fixed it up great.

*EDIT* I just realized I posted this in maps, not the modding section. If a mod want's to move it to the more appropriate section it'd be much appreciated.