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jonwil said:
My guess is that the patented technique has been replaced with something that does the same job but isn't patented.
Will be interesting to see how the source is used by modders.

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@id_aa_carmack twittered:
where it can't be shown the player is outside a shadow volume, I used the "preload" technique from http://kb.cnblogs.com/a/28036/

the preload shadow technique may have some other utility -- you can use it with a rear clip plane projection, unlike depth-fail

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7>EXEC : warning : idFileSystemLocal::StartBackgroundDownloadThread: failed
7>EXEC : FATAL error : Couldn't load default.cfg
7>C:\Program Files\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(103,5): error MSB3073: The command "cd C:\doom\trunk\neo\\..
7>C:\Program Files\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(103,5): error MSB3073: "build\Win32\Dedicated Release\TypeInfo.exe"
7>C:\Program Files\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(103,5): error MSB3073: :VCEnd" exited with code -1.

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5>win_input.obj : error LNK2001: unresolved external symbol _GUID_ZAxis
5>win_input.obj : error LNK2001: unresolved external symbol _GUID_YAxis
5>win_input.obj : error LNK2001: unresolved external symbol _GUID_XAxis
5>win_input.obj : error LNK2001: unresolved external symbol _c_dfDIKeyboard
5>win_input.obj : error LNK2001: unresolved external symbol _GUID_SysKeyboard
5>win_input.obj : error LNK2019: unresolved external symbol _DirectInput8Create@20 referenced in function "void __cdecl IN_InitDirectInput(void)" (?IN_InitDirectInput@@YAXXZ)
5>win_input.obj : error LNK2001: unresolved external symbol _IID_IDirectInput8A
5>win_input.obj : error LNK2001: unresolved external symbol _c_dfDIMouse2
5>win_input.obj : error LNK2001: unresolved external symbol _GUID_SysMouse
5>win_snd.obj : error LNK2019: unresolved external symbol _DirectSoundCreate@12 referenced in function "public: virtual bool __thiscall idAudioHardwareWIN32::Initialize(void)" (?Initialize@idAudioHardwareWIN32@@UAE_NXZ)
5>..\build\Win32\Dedicated Release\DOOM3.exe : fatal error LNK1120: 10 unresolved externals

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// patent-free work around
if ( !external ) {
// "preload" the stencil buffer with the number of volumes
// that get clipped by the near or far clip plane
qglStencilOp( GL_KEEP, tr.stencilDecr, tr.stencilDecr );
GL_Cull( CT_FRONT_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
qglStencilOp( GL_KEEP, tr.stencilIncr, tr.stencilIncr );
GL_Cull( CT_BACK_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
}

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