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Re: NEW LIGHT MAP ENGINE AND SUPPORT FOR SHADRES [Re: Matt_Coles] #152577
09/28/07 20:49
09/28/07 20:49
Joined: Oct 2002
Posts: 8,939
planet.earth
ello Offline
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ello  Offline
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Posts: 8,939
planet.earth
hm, i guess you misunderstood something, or i did. but softshadows have nothing to do with stencil shadows, or do they?

Re: NEW LIGHT MAP ENGINE AND SUPPORT FOR SHADRES [Re: ello] #152578
09/28/07 22:50
09/28/07 22:50
Joined: Aug 2001
Posts: 2,320
Alberta, Canada
William Offline
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William  Offline
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Posts: 2,320
Alberta, Canada
I hope not, many of meshes are not closed(save polygons in most cases), and stencil shadows do not work properly in most cases. I always thought soft shadows do not have this restriction, so have been waiting for them.


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Re: NEW LIGHT MAP ENGINE AND SUPPORT FOR SHADRES [Re: William] #152579
09/29/07 06:58
09/29/07 06:58
Joined: Jul 2003
Posts: 893
Melbourne, Australia
Matt_Coles Offline

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Matt_Coles  Offline

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Joined: Jul 2003
Posts: 893
Melbourne, Australia
Here it is from the beta page:

The render_stencil bitmap pointer allows rendering the stencil buffer content into an offscreen bitmap for further processing, such as blurring for creating smooth stencil shadows.

So all it does is allow shader affects such as softening on the existing stencil shadows.

Re: NEW LIGHT MAP ENGINE AND SUPPORT FOR SHADRES [Re: Matt_Coles] #152580
09/29/07 08:33
09/29/07 08:33
Joined: Oct 2002
Posts: 254
UK, London
Dyc Offline
Member
Dyc  Offline
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Joined: Oct 2002
Posts: 254
UK, London
render_stencil "can" be used to achieve soft stencil shadows, however the forcast still clearly states that a "soft shadow mapping" shader is still "HI". And last time I checked shadow mapping had not much to do with stencil shadow volumes. Shadow mapping

Re: NEW LIGHT MAP ENGINE AND SUPPORT FOR SHADRES [Re: Dyc] #152581
09/30/07 22:44
09/30/07 22:44
Joined: Jul 2003
Posts: 893
Melbourne, Australia
Matt_Coles Offline

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Matt_Coles  Offline

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Posts: 893
Melbourne, Australia
But that is still awhile away, ecspecially if the soft stencil shadow system is introduced. They will most prob work on other forecast features

Re: NEW LIGHT MAP ENGINE AND SUPPORT FOR SHADRES [Re: Matt_Coles] #152582
10/01/07 07:14
10/01/07 07:14
Joined: Oct 2003
Posts: 4,131
M
Matt_Aufderheide Offline
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Matt_Aufderheide  Offline
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Joined: Oct 2003
Posts: 4,131
Shadow mapping (shadow buffers) is generally much more desirable than shadow volumes (stencil shadows). This is because in general shadow maps are much more flexible in that they dont care what kind of geometry you render. For instance, trees can cast correct shadows from foliage and things like chain link fences, and meshes dont have to be closed.

I dont know how Conitec is doing the shadow volume extrusion, but my bet is they are NOT using the GPU, which is basically a bad idea if you want multiple lights and so on. In my experience Conitec generally opts to use the lowest-tech method for compatability.

Either way, shadow volumes are really not likely to be useful going forward in the general case ( some argue that DX10 will make their use more efficient, but still they cant handle many kinds of geometry).

The soft shadow aspect is not really a consideration, as both shadow maps and shadow volumes can be processed to have softness. Creating a true penumbra is much more costly and not possible without a quite a bit of fiddling, or multiple shadow samples. The Sphere shadows are done using a multiple sample (PCF), but the shadow maps were by neccessity lower res..

However, for a good example of excellent shadows, look at the new patch of Stalker, which has essentially perfect soft-shadow maps for every light and object in high-res (no true penumbra but everything else is perfect). It is essentially high-res lightmaping done in real time (without global radiosity however..). The era of static lightmaps is certainly long gone in commercial games.


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Re: NEW LIGHT MAP ENGINE AND SUPPORT FOR SHADRES [Re: Matt_Aufderheide] #152583
10/01/07 07:29
10/01/07 07:29
Joined: Oct 2002
Posts: 8,939
planet.earth
ello Offline
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ello  Offline
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planet.earth
maybe you should hire at conitec and give the engine a big punch:)

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