Heiko Schulz wrote:aeitsch...@yahoo.de>
> I coulden't try the new cloud patch yet- I'm waiting that someone makes a
> binary
> snapshot for win32-users ;-)
>
> So much I understood, there is a certain level of sprites numbers needed, so
> that the single clouds is correctly shaded.
> But as transpareny is one of the strongest factor which slows down, it is no
> wonder that the fps might decreases...
>
> As our technic is very similar to the one of X-Plane and MSFS, it is quite
> interesting how they got managed to have a bit better perfomance:
I think a big difference is that MSFS uses Impostors. These effectively
pre-render a set of sprites onto a texture, and use the resulting texture until
the view angle changes significantly. This saves a lot of transparency
rendering.
Unfortunately, last time I tried it, the OSG Impostor implimentation was very
broken, and I didn't have the skills to fix it.
I may have another look to see if it has been improved in recent OSG releases.
-Stuart
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