Shader help (Darkplaces)

[jim]

I need some help. I want to make a shader for windows in a texture. I want the window part in the texture to reflect stuff. Everything I've done so far, has not worked.

I've not even been able to get a texture overlay another. Like this here:

Code: Select all

textures/test/window_basic_one_00
{
   {
      map textures/test/window_basic_one_00.png
      rgbGen identity
   }
   {
      map $lightmap
      blendfunc filter
      tcGen lightmap
   }
   {
      map textures/liquid/blood.png
      blendfunc add
   }
}


The blood texture is not displayed at all (not that I really want additive blood on walls, but it just don't work!). Is Darkplaces shader support limited to only allow one texture in a shader?

[VorteX]

Currently darkplaces do not allow more than 2 stages for shader, one of stages is lightmap.

But there is a semi-hacky way to do layers, it works just fine. Use q3map_cloneShader <shadername> - this is compiler directive that lets q3map2 to place cloned surface infront of current with different shader (doubling total triangles count of a surface).

Code: Select all

textures/test/window_basic_one_00-additive
{
    surfaceparm trans
    surfaceparm nolightmap
    surfaceparm nonsolid
    surfaceparm trans
    surfaceparm nomarks
    surfaceparm noimpact

    {
       map textures/liquid/blood.png
       blendfunc add
    }
}

textures/test/window_basic_one_00
{
   q3map_cloneShader  textures/test/window_basic_one_00-additive
   {
      map textures/test/window_basic_one_00.png
      rgbGen identity
   }
   {
      map $lightmap
      blendfunc filter
   }
}


Since this is compiler feature, you can see additional layers only when you recompile your map with q3map2.

[jim]

Haa, great, thanks for this! I hope the triangle count doubling don't have too much performance hit though...