I pointed this bug out a while ago... it only takes into account the color
when anti-aliasing. It was agreed, I believe, that in the future it should
take the alpha value into account when anti-aliasing. But nothing was done
about it in beta 7.

- Slime
[ http://www.slimeland.com/ ]
[ http://www.slimeland.com/images/ ]

"Alex Falappa" <afa### [at] remove-medatamatit> wrote in message
news:3bea5a84$1@news.povray.org...
> Hi all,
> while experimenting with producing an alpha channel in output images I
came
> across what seems a bug (maybe related to that reported by John David
> Haiducek in the thread "Alpha output"):
> - text object are not antialiased against the background (they do against
> other objects) using alpha output on and method 1
> - text object are antialiased oddly against the background using alpha
> output on and method 2
>
> Environments:
> Pov 3.5beta7, Win2000professional, Dual celeron 400 mhz, 320 Mb RAM
> Pov 3.5beta7, Win98SE, PentiumIII 650mhz, 384 Mb RAM
>
> Test scene:
>
> #version 3.5
> // try to render with:
> // +UA +A0.1 +R3 +FN8
> // +UA +A0.1 +AM2 +R3 +FN8
>
> global_settings {
> //  assumed_gamma 1.0
>  max_trace_level 4
> }
> background { color rgb <1,1,1> }
>
> // ----------------------------------------
> camera {
>   orthographic
>   location <0,0,1>
>   look_at  <0,0,0>
>   right 1*x
>   up 1*y
> }
> // ----------------------------------------
>
> box {
>   <-0.5, 0, 0>, <0, 0.5, 0>
>   texture {
>     pigment {
>       checker color rgbt <.6,.5,.4,.2> color rgbt <.8,.9,1,.2>
>     }
>     finish {
>       ambient 1.0
>       diffuse 0.0
>     }
>  scale .25
>   }
> }
> box {
>   <0, 0, 0>, <0.5, 0.5, 0>
>   texture {
>     pigment {
>       checker color rgbf <.6,.5,.4,.2> color rgbf <.8,.9,1,.2>
>     }
>     finish {
>       ambient 1.0
>       diffuse 0.0
>     }
>  scale .25
>   }
> }
> box {
>   <-0.4, 0.35, -0.1>, <0.4, 0.45, -0.1>
>   texture {
>     pigment {
>       color red 1
>     }
>     finish {
>       ambient 1.0
>       diffuse 0.0
>     }
>   }
>   rotate 15*z
> }
> box {
>   <-0.4, 0.2, -0.1>, <0.4, 0.3, -0.1>
>   texture {
>     pigment {
>       color green 1
>     }
>     finish {
>       ambient 1.0
>       diffuse 0.0
>     }
>   }
>   rotate 15*z
> }
> box {
>   <-0.4, 0.05, -0.1>, <0.4, 0.15, -0.1>
>   texture {
>     pigment {
>       color blue 1
>     }
>     finish {
>       ambient 1.0
>       diffuse 0.0
>     }
>   }
>   rotate 15*z
> }
> text {
>   ttf
>   "Arial.ttf",
>   "POV-Ray",
>   1,
>   0
>   scale .2
>   translate <-.4,-.3,0>
>   texture {
>     pigment {
>       color rgb 0
>     }
>     finish {
>       ambient 1.0
>       diffuse 0.0
>     }
>   }
> }
> text {
>   ttf
>   "Arial.ttf",
>   "POV-Ray",
>   1,
>   0
>   scale .2
>   translate <-.2,-.06,0>
>   texture {
>     pigment {
>       color rgb 0
>     }
>     finish {
>       ambient 1.0
>       diffuse 0.0
>     }
>   }
> }
>
>
>

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