Curtis L. Olson wrote:

> This doesn't show up much in flat areas, but you can *really* see it in 
> mountainous areas. The cloud "bowl" is centered around the view point, 
> so as you fly, watch the clouds that appear in front of mountains, as 
> you get closer they will raise up and the intersection point will change.
> 
> This is a primarily a problem with the shape of the cloud bowl, and not 
> a problem with transparency or draw order or alpha test or anything like 
> that.

I tempt to disagree. I first noticed that in a very narrow valley with high 
walls ( near Mont Blanc ). I think in that case the mountain walls are so 
close that the curvature is negligible. Whatever is the distance between 
the ground and the clouds, if the clouds are between the viewer and 
the ground, the effect will show up.

I don't want to say there isn't a problem with curvature, but clouds don't
have a mimimun height. They can touch the ground, and the Metar code 
is reporting such a situation quite often.

I don't want either begin a total redesign of the cloud drawing before the 
release. An implementation without artefact of any kind will surely require
a lot of resource at runtime.

-Fred


_______________________________________________
Flightgear-devel mailing list
[EMAIL PROTECTED]
http://mail.flightgear.org/mailman/listinfo/flightgear-devel

Reply via email to