Das hat mir jemand auf FB mitgeteilt. Ich habs aber noch nicht getestet:
Über die Menübar oben: Windows -> Panes -> ShaderMixer:
It's very very simple...goto windows -->shader mixer-->file, new shader (type:camera then click ok)-->Right click on the Mixer and select Insert-->bricks-->Roots-->Lights-->Indirect Light (camera) then click create. Boom. Done. use it like any other camera, but there is a tab called Indirect light. As long as "Final Gathering" is on, it will bounce the light. Mess with the settings and see what comes up. I'm still learning. It's simple, effective and awesome! Don't know why they hide this!