Le 2023-06-14 à 09:27, Chris R a écrit :
> I am working on a scene that will include some glasses with colored liquids
> inside of them.  While working on the model for the liquid, I noticed that
> something odd was happening when I used interior fading to color the liquid.
> 
> The image on the left is the shape of the liquid rendered with a solid texture:
> pigment { color rgb 0.5 } interior { ior 1.34 }
> 
> The image on the right is the same shape rendered with a transparent texture and
> fading:
> 
> pigment { color rgbf 1 } interior { ior 1.34 fade_color <1, 0, 0> fade_distance
> 1 }
> 
>  From this viewpoint, in the solid version you can see the curve of the liquid
> object bowing upwards as expected.  In the transparent version, there is a sharp
> horizontal line where the fade_color ends, below that curve.  You can see the
> interior is still applying to the space above that line, as the vertical green
> cylinder is broken where the ior changes, but the fade color is completely
> missing in that segment.
> 
> I would expect to see some variation in the color in that region due to light
> traveling different distances based on the camera angle, but not a complete drop
> out.
> 
> Any idea why this might be happening?
> 
> -- Chris R.

There is a missing parameter : fade_power

Try again, but with fade_power 1001

That image look as if the fade_power is zero.

Post a reply to this message