did you use volume in corona case (i don't remember how it works I guess just absorption setting in material?)?kintuX wrote: ↑Sat Sep 21, 2019 7:11 am CPU PT
Halt Time: 90 s
Same geo, same IORs, colours HEX, default Sun & Sky...
LuxCore (w/ light tracing and all caches ON)
pooltest_caustics-LC.jpg
Corona ("Fast caustics solver" & "Generate caustics from environment")
pooltest_caustics-crn.jpg
About "Too Dark & Too Bright"... From real world I'd say LuxCores reflected caustics are more correct, it's only too much loos in refractive volume under glass (my old enemy). I suspect there's a mistake somewhere about how gamma is handled. Look at the corners how light bounced in Lux version gets darker Of course I can be wrong.
Also, Corona is much simpler, faster to set & reach the goal... while user also gets a caustic pass to fiddle with in post (if needed).
theres a note in corona freshdesk about how caustics in volumes are calculated the old way(not using this caustic solver) Which might mean there is a good brightness loss in underwater setting in corona as well.. This is where I think the "frankenstein" method of using hybrid glass and caustics on top of that could artificially compensate the problem in luxcore .