Following scene description makes caustic in 3.6 as I expected.
But in 3.7 beta(17), no caustic at all...

This problem is only for refractive caustic,
I checked reflective caustic(ex. ring) occurs in 3.7.

Is it a bug?
or have any syntax symmentic related to refractive caustic changed?

p.s. How can I get the source code of 3.7 beta??


====================================================================
#include "stdinc.inc"
#include "textures.inc"
#include "glass.inc"
#include "metals.inc"

global_settings {
  assumed_gamma 1
  max_trace_level 25

  photons {
    count 100000
    spacing 0.03
    autostop 0
    jitter 0
  }
}

camera {
        up <0,1,0>
        location <0,5,-12>
        look_at <0,0,0>
}


light_source {
        <10,11,10> //light position
        color rgb <1,1,1>*1.6
        photons {
         reflection on
         refraction on
        }
}

background { color rgb <0.4,0.4,0.6>  }

plane {
 y, -1
        texture {
         T_Brass_1A
        }
        photons {
         reflection on
         refraction on
         collect
        }

}


object {
        sphere { <0, -1+2, 0>,2 }
        material {
           texture {
                pigment { color Col_Glass_Clear }
                finish { F_Glass9 }
           }
           interior {
                I_Glass_Exp(2)
                fade_color Col_Glass_Clear
           }
        }

        photons {
        target
        reflection on
        refraction on
        //collect
        }

}
=======================================================================

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"Yongjin Kim" <sld### [at] postechackr> wrote:
> But in 3.7 beta(17), no caustic at all...
> Is it a bug?

since it's a beta, i'd bet it wasn't implemented yet.

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