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MAPPING: lightmap on transparent surface
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Author:  natirips [ 11.23.12 ]
Post subject:  MAPPING: lightmap on transparent surface
Here is an example of how to map lightmap onto a transparent surface (i.e. graffiti, tree branches,...).
Code:
textures/ut_faks2/gr-ntr
{
        surfaceparm nonsolid
        surfaceparm trans
        polygonOffset
        nomipmaps
        nopicmip
        {
                map textures/ut_faks2/gr-ntr.tga
                blendfunc blend
                alphafunc GE128
                depthwrite
                rgbgen identity
        }
        {
                map $lightmap
                rgbgen identity
                blendfunc filter
                depthfunc equal
        }
}

polygonOffset is not needed for tree branches, but is needed for graffiti, cracks, stains, etc.

This example is from ut_faks3 and is used for "NATIRIPS" graffiti.

This is what it can look like in-game (wall is one brush and graffiti is an overlapping brush that causes z-fighting in the editor but polygonOffset fixes z-fighting in-game):
Attachment:
shot0143_.jpg
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