Mapping: Terrain Morphing 4km vs 2km

[CodeRedFox]

[Info] The polygon diffrence between a 2km (12024x2) and a 4km (1024x4) maps.

Hello mappers,

Heres some quick Info on Terrain LODS when dealing with 4km maps.



The image above represents how the BF2 engine creates ground. A series of polygons.

A 1km map will have 1024 x 1024 polygons in a box formation.

Now a 4km has the same 1024 x 1024 but is stretched out 400% bigger. So where you had 4 polygons you now have only one.

• Flat ground: Image show what flat ground looks like.
• Share Incline: Image show what allot of areas on Feyzabad look like (little more drastic here). See the stretched polygons? The game doesn't like this. and at distance tries to un-stretch the polygon.
• Smooth Incline: Image show how the BF2 engine prefers the ground to be. Very little stretching.

Blue color is the polygon size of a 1km map
Green color is the polygon size of a 4lk map (Polygons are twice a big/scaled)



Stretching at distance.



As you can see without smoothing surfaces the engine tries to smooth it at a distance. As you move closer the engine returns the polygons to its correct shape.

Hope that helps all of you.