It's possible to have two layers of shadow map to separate static and
dynamic things, but at a significant cost (you need the extra buffer,
and the memory bandwidth to sample it, ...). Probably not a win on the
kind of hardware that needs a speedup here.

On Wed, Apr 4, 2012 at 7:45 AM, Vivian Meazza <vivian.mea...@lineone.net> wrote:
> Stuart wrote
>
>> Hi All,
>>
>> Rembrandt works well on my GT260M, and really moves FG's graphics on
>> massively.  I think it's a fantastic enhancement to FG, and we should
> really
>> consider naming the July/August release as v3.0.0.
>>
>> Does anyone know whether FG is unique amongst desktop simulators in
>> offering this?  I have no experience of X-Plane nor FS-X.
>>
>> 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.
>>
>
> Don't get over excited. Fred is doing a great job, but there are many bugs
> to iron out yet. We haven't been able to port the water shader nor the
> ubershader completely to Project Rembrandt yet . Each aircraft in the
> inventory needs checking for 2 sided faces, panel lights need converting,
> and nice to have are nav. lights and landing lights. Much of the shared and
> scenery models need similar checking: the windsock is an obvious one. Can
> you imagine the task for USS Vinson? Random Vegetation is unusable.
>
> Frame rate is taking a big hit for most if not all systems .
>
> With a fair wind, and if we can jump  over some of the technical hurdles, I
> think it might just be feasible to get something called FG 3.0.0 out of the
> door by the end of this year, but I wouldn't bet on it at this stage.
>
> Vivian
>
>
>
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