Terrains not matching up

[werner.poetzelberger]

Hello.

 

I am creating 4 terrains out of a 32K texture, which I split into 4 16K textures.

 

The Terrain is 16K, 0.25 step size. 

 

The issue here is, that they are not matching. Please see image.

 

I am saving the height maps in a .PSD format (Multichannel, 16 bit) which give generally good results.

 

It does not seem, that there is a problem with the height-maps (seams) as they come from a single texture, without compression in the image.

 

The difference is not that much (less than 1 step). But in fact this phenomenon I have at all the 4 seams.

 

I already tried double precision, but this didnt help either.

 

Do you have any ideas?

 

Thank you very much.

 

 

Best.

 

werner

 

[ulf.schroeter]

The height map textures must have a 1 unit overlap with exact same height values. By just splitting  32K texture into 2x 16K textures there is NO overlap and so the heigt values of adjacent ObjectTerrain height maps are not the same.

[werner.poetzelberger]

Ulf .... thank you! 

 

This saved a lot of experimenting time!

 

Cheers

 

Werner

[werner.poetzelberger]

Is there a similar rule for the DT as well? I am getting seems there as well.

 

 

best.w.

[ulf.schroeter]

yes, there also should be exactly the same color information on adjacent object edges.

[werner.poetzelberger]

So Ulf, how do I do that?

 

Do I take a power of two texture size and overlap it the way I do it with the height map?

 

I cant (in theory) not make a po2+1 diffuse texture.

 

Or do I (as I would, if mapping normal objects lying side by side) just cut a texture exactly in the middle?

[ulf.schroeter]

Copy a pow2+1 pixel texture part and then scale it down to pow2 dimensions

 

https://developer.unigine.com/forum/topic/1077-solved-terrain-streaming/?p=5506

[werner.poetzelberger]

Hmm interesting.

 

I am fighting with the DT seams. I will see. None of the tried techniques gave a pleasing result.

It seems, that they don't match that well together.

 

Its always interesting which things come up.

 

b.w.

[pascal.winistoerfer]

werner, did you get any results yet?

 

 

would be interesting how you solved it.

 

i'm using worldmachine.

 

cheers

pascal