Warp <war### [at] tagpovrayorg> wrote:
> Vojtech Spiwok <spi### [at] vschtcz> wrote:
> > I would like to render a picture of object (protein)
> > with a depth cueing. Simple z-oriented ground fog does
> > not work because if the fog distance is too small the
> > picture is almost white and when it is large there is
> > almost no depth-cueing efect.
>
>   How about this?
>
> camera { location -z*8 look_at 0 angle 35 }
> light_source { <100,150,-400>, 1 }
> fog
> { rgb <1,1,1>
>   fog_type 2
>   distance .1
>   fog_offset -.5
>   fog_alt .2
>   up -z
> }
>
> union
> { sphere { <-1,-1,-1>, .2 }
>   sphere { <-1,-1, 1>, .2 }
>   sphere { <-1, 1,-1>, .2 }
>   sphere { <-1, 1, 1>, .2 }
>   sphere { < 1,-1,-1>, .2 }
>   sphere { < 1,-1, 1>, .2 }
>   sphere { < 1, 1,-1>, .2 }
>   sphere { < 1, 1, 1>, .2 }
>   cylinder { <-1,-1,-1>,<-1,-1, 1>, .1 }
>   cylinder { < 1,-1,-1>,< 1,-1, 1>, .1 }
>   cylinder { < 1, 1,-1>,< 1, 1, 1>, .1 }
>   cylinder { <-1, 1,-1>,<-1, 1, 1>, .1 }
>   cylinder { <-1,-1,-1>,<-1, 1,-1>, .1 }
>   cylinder { < 1,-1, 1>,< 1, 1, 1>, .1 }
>   cylinder { < 1,-1,-1>,< 1, 1,-1>, .1 }
>   cylinder { <-1,-1, 1>,<-1, 1, 1>, .1 }
>   cylinder { <-1,-1,-1>,< 1,-1,-1>, .1 }
>   cylinder { <-1, 1, 1>,< 1, 1, 1>, .1 }
>   cylinder { <-1,-1, 1>,< 1,-1, 1>, .1 }
>   cylinder { <-1, 1,-1>,< 1, 1,-1>, .1 }
>   pigment { rgb x } finish { specular .5 }
>   rotate <-60, -30, 0>
> }

Simple ground fog works well !!!!!!!
Thank you all very much for your help

Vojtech Spiwok

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