Edit:
I crashed my whole map, for finding the issue. :rolleyes: But find nothing. I have now only my landscape, a simple etmospheric fog, a simple directional light, with LF_Caustics_inst (now i know, from where the caustics come. But I still don’t now on what the caustics are bind to the waterline).
On that screenshot, there are caustics (the dark areas). Why? I have no waterline, no PostProcess for water, nothing. It’s curious …