Re: [Flightgear-users] Zfar/Znear problem (was Multiplayer aircraft partly disappear when close)

[Harald J. <hjo...@ev...>]

Jon Stockill wrote:

>Hal V. Engel wrote:
>  
>
>>OK that sounds like a reasonable explanation that fits my description of the 
>>problem well.   Is there any chance that a fix for this will be in the next 
>>release?  
>>    
>>
>
>How much of a hit is there when changing zfar? (Assuming it can be done 
>dynamically). Would it be possible to tie it to the visibility?
>
>Jon
>
>  
>
Well, the zfar should still be a bit away from the visibility range. At 
max visibility range the horizon is white (or the fog color) but we can 
still see a few things. If zfar is set too near then we will see the end 
of the world :p
But perhaps that steting zfar to visibility + a few kilometers should be 
enought. Anyway we allways have the possibility to increase the 
visibility range if in doubt. On the performance side having a smaller 
zfar can (perhaps) increase the fps because today we can be drawing 
triangles that are 30 km away even when we only have a 16km visibility.

HJ.