you can add a layer between the star and sun layer that makes a 'second sun'
under the first one. that second sun has to be the color of the sky (black?)
and fades into transparant at a certain distance to the real sun's borders.







"Rich" <SrP### [at] ricoswebcom> schreef in bericht
news:Xns### [at] 204213191226...
>     Tek has posted some really nice work in the images group, and I've
> borrowed some of the code that he and others have posted regarding the
> rendering of realistic star fields and the sun.  The problem I'd like to
> address in my render is the fact that if the sun is visible to any degree
> in an image, there's absolutely no way you'd be able to see the stars.
>     So, realism is not the best option here, but I'd at least like to
> get rid of the stars that are visible through the sun's "atmosphere" and
> a bit beyond that.  I've attempted to place the pigments in a
> pigment_map, but for some reason the star pigment is washed out and I
> can't figure out why.
>
> Here's the code:
>
> global_settings {
>   assumed_gamma 1.0
> }
>
> camera {
>   location  <0.0, 1.5, -10.0>
>   direction 1.5*z
>   right     x*image_width/image_height
>   look_at   <0.0, 0.0,  0.0>
> }
>
> #declare pStars = pigment {
>   pigment_pattern {
>    crackle form <1,0,0>
>    pigment_map {
>     [0 crackle solid
>        pigment_map {
>          [0 bozo scale 30
>             colour_map {
>               [0 rgb .7]
>               [1 rgb 1.3]
>             } ]
>          [0.75 rgb 0]
>        } ]
>     [1 rgb 0]
>    }
>   }
>   colour_map {
>    [.5 rgb 0]
>    [1 rgb 3]
>   }
>   scale 0.004
>   rotate <45,90,45>
>  }
>
> #declare pSun = pigment {
>   gradient y scale 2
>   translate -1 poly_wave 50
>   colour_map {
>     [0 rgbt 1]
>     [1 rgb <3,2,1>]
>   }
> }
>
> sky_sphere {
>   pigment {
>     gradient y
>     pigment_map {
>       [0.0  pStars]
>       [0.85 pSun]
>     }
>     rotate <80,325,0>
>   }
> }
>
>
> --
> Rich Allen
> (Remove SPAM from my address to reply by e-mail)

Post a reply to this message