begemotv2718 nous apporta ses lumieres en ce 24/06/2006 00:57:
> I am trying to make a transparent bottle with a transparent label (i.e. I
> want only the text of the label to be visible). When I trace the label
> without the bottle everything is OK, only the text is visible. However,
> when I trace this with bottle there is a distinct shadow on the surface of
> the glass where the transparent part of the label begin. How to get rid of
> this artefact?
> 
> The label is produced by the following code:
> #declare label =
>    difference{
>     cylinder { <0,0,0>, <0,60,0>, 31.855
>        scale 0.1
>              }
>      cylinder{ <0,0,0>,<0,60,0>, 31.853
>          scale 0.1
>      }
>    pigment { image_map { gif "label.gif"
>                     map_type 2
>                     transmit 255, 1.0
>                     transmit 0, 0.01
>                     //once
>                     interpolate 2
>                     }
>       scale 20*y
>       rotate 84*y
>        translate -8.5*y
>    finish{
>            reflection 0
>            diffuse 0
>            ambient 0
>              }
> }
> 
> The gif image is black text over the white background.
> 
> 
> 
> 
> 
> 
> 
Try using a larger max_trace_level. The default of 5 is probably to small.
Try: global_settings{max_trace_level 7}

-- 
Alain
-------------------------------------------------
How much deeper would the ocean be without sponges?

Post a reply to this message