Re: A challenge: deferred lighting and shadows, looking for a programmer

I don't know yet I'll try look at the demo and the code those following 
days.
Then I'll probably send a mail explaining how I want to proceed.


On 18/07/2013 20:59, Jorrit Tyberghein wrote:
> That's great! How do you want to proceed? You can enable the defered 
> render manager in engine.cfg
>
> A test level that I'm currently using can be downloaded from 
> http://www.crystalspace3d.org/downloads/tmp/ghosts.zip
>
> This level shows various problems. Just walk around and you'll see. 
> Inside the house it is dark. Using 'f' (flashlight)
> in walktest you can get some lighting.
>
> Let me know what more info you need to get started.
>
> On Thu, Jul 18, 2013 at 6:51 PM, Steel Style <[email protected] 
> <mailto:[email protected]>> wrote:
>
>     Hello,
>
>     I think that the idea of improving this render manager is really
>     worthwhile.
>     I would like to try as I'm have some free time, but I never
>     implemented
>     deferred shading or deferred lighting.
>
>     So if someone acknowledged want to work on it, it might be better,
>     otherwise I'm up to challenging myself.
>
>     Steel
>
>
>     On 18/07/2013 13:13, Jorrit Tyberghein wrote:
>>     Hi all,
>>
>>     Since some time Crystal Space has a deferred render manager which
>>     implements deferred
>>     lighting with shadows. Matthieu Kraus worked on this but doesn't
>>     have time right now to
>>     continue working on this (since he is now working on another part
>>     of CS as part of
>>     Google Summer of Code). He is available for advice though.
>>
>>     As such this new render manager works nicely. It produces nice
>>     visuals with real dynamic
>>     shadows. However there are still some issues which make quality
>>     less then desired. I
>>     would like to use this render manager in my Indie game project
>>     and I need professional
>>     quality there.
>>
>>     Firstly performance is a problem. The performance right now goes
>>     down rather fast with
>>     number of lights and objects. While of course deferred lighting
>>     will always be somewhat
>>     slow (and it is also up to the level designer to construct
>>     optimal levels) I think that
>>     some improvements should be possible here.
>>
>>     Second there are various quality issues. First the display is not
>>     stable when moving
>>     around. Shadows flicker and there are very disturbing slight
>>     movements of the shadows.
>>
>>     Thirdly there are also errors in the shadow casting. Sometimes
>>     light leaks through at
>>     places where it shouldn't for example.
>>
>>
>>     I would like to find someone who can help improve the deferred
>>     render manager until
>>     we can get shadows as good as we can get in commercial games. I
>>     can provide test levels
>>     to demonstrate various problems and Matthieu and Frank Richter
>>     kan give advice on
>>     various part of the Crystal Space internals. I think that some
>>     familiarity with shaders
>>     and rendering/lighting techniques would be a great bonus here.
>>
>>
>>     Matthieu already mentioned a few things that could be done:
>>     - Caching: this is probably one of the most important things to
>>     implement.
>>     - Tweaks on how depth values are stored and retreived.
>>     - Better filtering (like PCF)
>>
>>     So who would like to try? I think this is an important area in a
>>     modern game engine
>>     so it would be a worthwhile task.
>>
>>
>>     Greetings,
>>
>>
>>     --
>>     Project Manager of Crystal Space and CEL
>>     (http://www.crystalspace3d.org/)
>>     Project Manager of AresEd (https://code.google.com/p/ares/)
>>     Support: https://www.gittip.com/jorritTyb/
>>
>>
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>
>
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> -- 
> Project Manager of Crystal Space and CEL 
> (http://www.crystalspace3d.org/ 
> <http://www.crystalspace3d.org/main/Main_Page>)
> Project Manager of AresEd (https://code.google.com/p/ares/)
> Support: https://www.gittip.com/jorritTyb/
>
>
>
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