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Following scene produces a uncorrect rendering where the transparent sphere
interesects with the blob. Is this a know problem? I think it is quite annoying
though it can be reduced by scaling the whole scene by a factor.
I tried the scene with version 3.0 and 3.1g as well as with megapov, same result
everywhere. Where does this effect come from? Some epsilon value? Hmm... but why
should the ray not hit the blob when it is near the edge of the transparent sphere?
- Micha
//begin code
#declare SCALE=1 //try different values for different
//size of the black intersection
camera
{
location <2,1.8,-2>
angle 20
look_at 0
scale SCALE
}
blob{ threshold 0.3
sphere{<0.021,0.043,0.026>,0.489,1}
scale 0.779
// sturm //does not change anything
translate <-0.796,-0.889,1.063>
pigment{rgb 1}
scale SCALE
}
sphere{<0,0.01,0>,1.4
pigment{ color rgbt<1,1,1,1>}
scale <0.8,2,.8>
translate<0,-1,0>
scale SCALE
}
light_source{<10,10,-100>
color 1
scale SCALE
}
//end code
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No, no, it is not that simple. It has to be either a problem with an epsilon
value or a bug in the programming. It is not really black lines but a part of the
blob (where the sphere intersects) is cut away.
- Micha
Marc-Hendrik Bremer wrote:
> Did you try to set max_trace_level in the global_settings{} higher? When it
> comes to transparency and black lines this seems always to be a good bet.
> May be something else, though.
>
>
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