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Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 1:26 am
by 2mg
Is it normal to see less of terrain when I look directly at it? I have Terrain Lodding ON, but maximum 4-Layer Distance and Force LOD Distance.

http://imgur.com/a/uuKCn

Re: Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 1:33 am
by MrTwosheds
Yes. Not much to do with terrain Lod, more to do with the fog. A useful trick when trying to fire at objects just out of vision range, (like mega towers) is to not look straight at it, you can see just a little bit further.

Re: Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 1:55 am
by Ded10c
This, I assume, is because fog is drawn at a linear tangent to the player's view and not radially (the way objects are rendered). For want of a diagram;

·     _ .
|     |/
*    *

The asterisks represent you, the lines your lines of sight, the underscore the fog and the dot the object. The fog is drawn linearly - it's perpendicular to you and at the specified distance (let's call that 400m) only at one point. The object - let's say that's 405m away - appears closer with respect to the fog when you turn because the object is always 405m away.

Re: Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 2:01 am
by GSH
Well, I'm telling DirectX 9 to use range based fog, but it makes no difference. Bug your GPU supplier for not implementing things correctly.

-- GSH

Re: Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 2:02 am
by Nielk1
Minecraft has cube fog too, though everything in Minecraft is a cube. Many games have fog that does this.

EDIT: GSH, I think every card isn't doing it right. Makes me wonder if there is more of a trick to it.

Re: Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 5:41 am
by 2mg
Nielk1 wrote:Minecraft has cube fog too, though everything in Minecraft is a cube. Many games have fog that does this.

EDIT: GSH, I think every card isn't doing it right. Makes me wonder if there is more of a trick to it.
Signed.

Re: Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 6:21 pm
by 2mg
PS: are we confusing Fog with LOD here?

Re: Visibility/Terrain LOD

Posted: Thu Feb 27, 2014 8:46 pm
by Ded10c
2mg wrote:PS: are we confusing Fog with LOD here?
Yes. This isn't LOD related; that lowers the detail of objects/terrain further away from you.

Re: Visibility/Terrain LOD

Posted: Sun Mar 02, 2014 1:30 pm
by 2mg
Soo...

Any chances for a round fog?