Christian Froeschlin schrieb:

> While testing I also had the curious effect that I got additional
> caustics from the glass when *removing* the window pane. I really don't
> quite understand how this can affect anything, the window pane uses
> photons {pass_through refraction off reflection off collect off}.
> The water glass is the only photon target in the scene.

What's your max_trace_level (for photons) set to?

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