Slight improvement with the brightness. I think your diffuse and
brilliance might be too high, try the default settings of 0.6 and 1.0
respectively, as for ambient, I find the default of 0.1 to be
unrealistically low for typical situations, try 0.2-0.3. One of the
problems seems to be the contrast between the bright and dark parts of
the image, raising the ambient should fix this. In the example below, a
subtle highlight really helps the texture (after all, most wood surfaces
have some degree of polish), look at the specular and roughness
settings.

I fiddled around with something similar and came up with the attached
code. Sorry, jpg, just png, I all my conversion programs seem to be
crashing lately. Mine might be a little too dark. This is the code for
the wood (based on one of the textures in the Moray library, I added the
finish settings):

BTW: Anyone know why the background is patchy in the attached .png? It
seems to happen very often in my images.

#declare _auto_name_no_1_ = 
   texture  // txt_84
   {   
      pigment
      {
         wood
         color_map
         {
            [ 0.0     rgbft <1.0, 0.85, 0.5, 0.0, 0.0> ]
            [ 0.5     rgbft <0.9, 0.7, 0.46, 0.0, 0.0> ]
            [ 0.7     rgbft <0.9, 0.7, 0.46, 0.0, 0.0> ]
            [ 1.0     rgbft <1.0, 0.85, 0.5, 0.0, 0.0> ]
         }
         turbulence 0.02
         octaves 4
         lambda 3.0
         ramp_wave
         scale  0.175
         rotate    <2.0, 2.0, 0.0>
      }   
      finish
      {
         ambient 0.3066
         phong_size 0.0
         specular 0.155633
         roughness 0.014533
      }
   }
   texture  // txt_85
   {   
      pigment
      {
         wood
         color_map
         {
            [ 0.0     rgbft <1.0, 0.45, 0.1, 0.8, 0.0> ]
            [ 0.5     rgbft <0.85, 0.65, 0.4, 0.4, 0.0> ]
            [ 0.7     rgbft <0.85, 0.65, 0.4, 0.4, 0.0> ]
            [ 1.0     rgbft <1.0, 0.45, 0.1, 0.8, 0.0> ]
         }
         turbulence 0.02
         octaves 4
         lambda 2.8
         ramp_wave
         scale  <0.2, 0.2, 0.2>
         rotate    <2.0, 2.0, 0.0>
         translate    <0.0175, 0.0175, 0.0175>
      }
   }

-- 
Chris Maryan
mailto:cma### [at] geocitiescom
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