Landscape Seams - within a single landscape object!

[Rainchild]

Hiya, I just experienced something quite worrying today -- visible seaming within a TVLandscape object (not between two of them)!

Here's a screenshot of the trouble I'm having -


(full size image is http://www.rainchild.com/lod-issues.jpg)

And if you want the actual terrain object to load/inspect for yourselves - http://www.rainchild.com/world_HF_x0y0.ter ...

The LOD call I use is -

_Landscape.EnableLOD(true, 256, CONST_TV_LANDSCAPE_PRECISION.TV_PRECISION_LOWEST, 256, false);


This is somewhat of a showstopper - it's hard enough working around the seams between landscapes without getting them happening within the actual landscape objects themselves!

Any tips/help/fixes with this would be super welcome

-- Rainchild

[SylvainTV]

This means that the LOD changed too fast between two LODs
Try to increase the values from 256 to 512 for example.

[Zaknafein]

I've also seen this kind of issue a loooong while ago with progressive LOD, so make sure you're not using SetProgressiveLOD(true).
If you do want to use it, make sure it's not possible to go "lower" than the LOWEST precision level by walking LOD levels. I mean by that, if your terrain is 1 million world units and your LOD levels are seperated by 256, then you'll hit the minimum level much before the terrain stops rendering. Seams and height field distortion will start to appear at that point.