POV-Ray : Newsgroups : povray.general : Turbulence in a pigment_map : Re: Turbulence in a pigment_map Server Time: 26 Oct 2020 12:25:48 GMT
  Re: Turbulence in a pigment_map  
From: Alain Martel
Date: 7 Sep 2020 22:53:10
Le 2020-09-07 à 18:32, Uncle Josh a écrit :
> I'm trying to animate a burning effect on object. I tried both pigment map and
> texture maps, but the turbulence applied to the outer texture is being applied
> to the inner textures, which I don't want.
> 
> I thought this was possible, but my active working memory is a couple decades
> old.
> 
> Sample:
> 
> #declare P_cells = pigment { cells scale 0.1 }
> #declare P_fire = pigment { gradient x
>                              pigment_map { [0.75 rgb 0 ] [0.8 red 1 ] } }
> #declare P_clear = pigment { color rgbt 1 }
> 
> #declare T_cells = texture { pigment {P_cells} }
> #declare T_fire = texture { pigment { P_fire } }
> #declare T_clear = texture { pigment { P_clear } }
> 
> #declare Burning_Texture =
>     texture {
>         gradient x
>         texture_map {
>           [0.0 T_cells ] [0.7 T_cells ]
>           [0.75 T_fire ] [0.8 T_clear ]
>           }
>         turbulence 0.2 // should only apply to the mapping
>     } // end of texture
> 
> I've tried this with material maps and pigment maps. I've tried putting the
> turbulence in a warp block, nothing works.
> 
> I thought this was possible to do. Am I wrong?
> 
> Thanks,
> 
> 
> 
> Uncle Josh
> Pontificating on the web since 1995
> 
> 
> 

Did you try this variation ?
#declare Burning_Texture =
    texture {
        gradient x
        texture_map {
          [0.0 T_cells turbulence -0.2] [0.7 T_cells turbulence -0.2]
          [0.75 T_fire turbulence -0.2] [0.8 T_clear turbulence -0.2]
          }
        turbulence 0.2 // should only apply to the mapping
    } // end of texture

You may need to use warp{turbulence -0.2} and warp{turbulence 0.2} for 
this to work properly.


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