Actually, what I wonder is, do we need the scenery cast shadows to be
calculated on each frame? Is there a way that they can be "stored" and just
updated every few minutes for static objects?
> Date: Tue, 3 Apr 2012 13:53:08 +0100
> From: aeitsch...@yahoo.de
> To: flightgear-devel@lists.sourceforge.net
> Subject: Re: [Flightgear-devel] More Rembrandt Feedback
>
> Hello,
>
> > Does anyone know whether FG is unique amongst desktop simulators in
> > offering this? I have no experience of X-Plane nor FS-X.
>
> Yes, X-Plane 10 also makes use of deferred shading. They just named it Global
> Lighting/HDR. Framerates aren't better there as in FGFS as now.
> The difference is only that landinglights there looks much smoother (no hard
> edges), the same for the shadows.
> But we have a really good start as a non-commercial product. Very promising,
> especially as an OpenSource-project. Thanks Fred for your great work!
>
> Can't tell about FS-X, but I guess it is a similar technic.
>
> > I've noticed significant slowdown on my computer in the following
> > circumstances:
> > - Forests (e.g. KHAF). Having not looked at the code, my guess is that
> > some NodeVisitor for the rending is delving too deeply into the OSG
> > tree for the random vegetation.
> > - Urban areas. My guess here is that is purely due to the number of
> > models being rendered, each of which is casting a shadow. I know that
> > there are still optimisations to be made, but could I suggest a
> > property switch to limit shadowing to the user's aircraft? IMO the
> > self-shadowing in the aircraft cockpit is the most impressive part of
> > Rembrandt, and the combination of that plus shadowing on the ground
> > might be an acceptable frame-rate compromise for many users.
>
> Agree to Stuart.
> - Forest seems to need much more perfomance than before.
>
> Other things I noticed:
> - Scenery-terrain seems to cast shadows. Visible especially shortly before
> dawn or shortly after dusk. Great feature if so, but seems also need a lot of
> perfomance. Maybe it can be made switchable?
>
> - Comparing different aircraft-models showed me, that not the general number
> of vertices or even faces is the limiting factor, but the number of objects.
> Especially instruments which makes use of many objects, so using non-shadow
> animation would be very recommended for instruments.
>
> -I do like when scenery objects cast shadows. But Do we need that in a far
> distance?
> Maybe we can have a distance limitation additional to Stuarts proposal?
>
> To my surprise it isn't very difficult to make aircraft rembrandt-compatible.
> The combined-shader is already converted and especially the IAR80 looks
> really cool with shadows.
>
> Cheers
> Heiko
> still in work: http://www.hoerbird.net/galerie.html
> But already done: http://www.hoerbird.net/reisen.html
>
>
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