"Louis-Severin" <lou### [at] a3epflch> wrote:
> Hello,
>
> I have problem using fringe projection through several lenses. Hereunder my
> povray code. If i project fringe through a single lens, fringe shadow
> appear clearly. But if i put another lens, also with photon properties, the
> shadow appear as a simple black square.
>


In the message pane you get the message below;


  Infinite objects:          2
  Light sources:             1
  Total:                     6
Possible Rendering Error: Maximum trace level reached! If your scene
contains black spots read more about the max_trace_level setting in the
documentation!

Render Statistics
Image Resolution 320 x 240

Pixels:            76800   Samples:           76800   Smpls/Pxl: 1.00
Rays:             443610   Saved:                 0   Max Level: 5/5

In the global settings add a line for max_trace_level
Such as;

/* PHOTON TUNING
================*/
global_settings {
  max_trace_level 10
  photons {
    spacing .07
    gather 5,15
    }
}

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