[Fluxus] texture transparency for particles

[gabor papp]

hi Kassen,

> think. However now the clouds don't always disappear when the plane should
> obscure them, they are seen through the plane until some point where they
> suddenly blink out of sight.
i think this is caused by the fact that depth sorting calculates the 
distance from the camera, and it renders the objects from back to front. 
since you use a big plane, its distance calculation is not perfect. 
probably a simple workaround if you subdivide the plane into smaller planes.

nice clouds, by the way :).

best,
gabor