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With CPU the caustics are visible, but hardlySharlybg wrote: Mon Apr 11, 2022 6:43 pm Can you please show your blender addon pref.
And does it happen with CPU only render too ?
Hmm...not really. With LT on, Caustics will be reflected on the walls. Caustics will then usually still be visible through glas, water...bdjones wrote: Mon Apr 11, 2022 7:18 pm ah, there's a difference between Viewport and Final Render, I do see caustics with light tracing off in final render. I've been doing stuff that didn't need caustics seen through something transparent so have just been using Tracing. So in final render - refractive/reflective caustics will be visible through a transparent medium with Caustics cache (in Photon GI cache) only but Tracing is a lot cleaner right away. But refractive/reflective caustics will only show through a transparent medium if Caustics Cache is on and the combo of Cache and Tracing is slightly quicker too.
CausticsDebug.zip