I've noticed that meshes often end up with odd (and ugly) areas where the lighting goes wrong. The result is a mess of dark triangles or blotches.

Any idea what can cause this? Too many lights? Not enough lights? Too many meshes in the same map? Too large meshes? ...?

Did you try other q3map2 versions. There are several patches for it in Nexuiz svn. tZork migh have already compiled version.

Alien wrote:Did you try other q3map2 versions. There are several patches for it in Nexuiz svn. tZork migh have already compiled version.

I've only tried MacRadiant 1.4. Where can I get the patches that might fix this problem? How do I install them? (I'm using OS X)

try adding "q3map_lightmapSampleOffset 8" to the shader for this surface. if it still splotches, raise that value. (don't forget to list the shader in shaderlist.txt)

tZork wrote:try adding "q3map_lightmapSampleOffset 8" to the shader for this surface. if it still splotches, raise that value. (don't forget to list the shader in shaderlist.txt)

My shader-fu is somewhat weak. How would I make a shader that does nothing but what you're saying above? This does not work (stripes2.jpg isn't rendered at all):

Code: Select all

textures/hookrace/stripes2
{
   qer_editorimage textures/hookrace/stripes2.jpg
        q3map_lightmapSampleOffset 8
   {
      textures/hookrace/stripes2.jpg
      map $lightmap
      rgbGen identity
   }
}


something like:

Code: Select all

textures/hookrace/stripes2
{
    qer_editorimage textures/hookrace/stripes2
    q3map_lightmapSampleOffset 8

   {
      map textures/hookrace/stripes2.jpg
   }

   {
      map $lightmap
      blendfunc filter
      tcGen lightmap
   }
}


tZork wrote:something like:

Code: Select all

textures/hookrace/stripes2
{
    qer_editorimage textures/hookrace/stripes2
    q3map_lightmapSampleOffset 8

   {
      map textures/hookrace/stripes2.jpg
   }

   {
      map $lightmap
      blendfunc filter
      tcGen lightmap
   }
}


That works. Thanks. It doesn't entirely rid me of the splotches, but at least it reduces them to a tolerable level. Only thing left now is to find an optimal value for q3map_lightmapSampleOffset.

try increasing q3map_lightmapSampleOffset to 10 and so on. the higher the value the less splotching. but it also flattens the lighting out more. as a last resort there's q3map_splotchFix but it not recommended unless nothing else works.

tZork wrote:try increasing q3map_lightmapSampleOffset to 10 and so on. the higher the value the less splotching. but it also flattens the lighting out more. as a last resort there's q3map_splotchFix but it not recommended unless nothing else works.

Hmm.. I've tried various values of q3map_lightmapSampleOffset now, and it seems that while higher values reduces blocky, unwanted shadows, it introduces unwanted lighting. Bad either way. I've set q3map_lightmapSampleOffset to 1 now. Doesn't do much, of course.

q3map_splotchFix, as far as I could tell, did not make any difference at all. Maybe I didn't do it right.

Well, the map is going up real soon. It has some ugly shading artifacts, but it's playable anyway.