On 21-11-2011 8:50, clipka wrote:
> Is that your complete scene? Because when I render it I don't see
> anything brownish where the two gels overlap.
>
>
> Try giving the blue gel a slightly green-ish hue, say rgbf <0,0.2,1,.9>,
> otherwise the combination of the two filters will let no light through
> at all (<0,0,1>*<1,1,0> = <0,0,0>).

The boxes should be *hollow* in order for the media to show. Also, if 
you want the media to show the gel's colour, do this, and switch off the 
photons and the absorbtion for the time being. I think the brownish 
colour comes from the way the light is treated in RL and in POV-Ray: 
additive versus substractive?

      #declare Blue_gel =


                         box {<0, 0,0 >  <1, 1, -.01 > hollow
                         texture {pigment {rgbt 1}}
                           interior {
                                  media {
                                         //absorption  Blue
                                         scattering {1, <0,0,1>*1000}
                                        }

                                     }
                         /*photons{
                                 target
                                 reflection on
                                 refraction on
                                 }*/

                              }

       #declare Yellow_gel =
                         box {<0, 0,0 >  <1, 1,-.01 > hollow
                         texture {pigment{rgbt 1}}
                           interior {
                                  media {
                                         //absorption  Yellow
                                         scattering {1, <1,1,0>*1000}
                                        }

                                     }
                         /*photons{
                                 target
                                 reflection on
                                 refraction on
                                 }*/



                         translate <.5,.5, -.5>}

Blue_gel
Yellow_gel


Thomas

Post a reply to this message