Hello
i unarchived a max2021 + vray 5 scene and update it to max 2024 + vray 6.20
this scene is quite heavy (~55Go peak Ram usage)
on my reference computer the scene took 1h23min to render (6000x3000) with vray 5
now it takes more or less 7 hours. (same sampling, same size, same assets etc.)
what have you done to vray guys ? 
After some investigations, i found vray clipper is guilty.
I join two pictures.
here there is no clipper (!)
but here the whole scene is “behind” a vray clipper.
I can see the number of unshaded rays increased a lot. Ok i suppose it’s normal. Each ray has to check wether it is clipped or not.
But what is less normal, is why vray 5 was able to render my scene within 90 minutes when vray 6 needs more than 400 minutes !
What have you done to the clipper ?
In this simple example i have “only” a 50% render time increase, but on a real production ready scene, it’s a x4…
99% of the rays shot by vray are unshaded rays.
i have an “old” computer with vray 5.20.02
the render time is pointless since it’s not the same cpu. What is important on this picture is i have only 6754 unshaded rays Vs 37 844 452 (lol it’s a 5 603 factor)
Could you please send me the old vrayclipper.dlo ?
well seriously, is there a workaround and what changed behind the scene between vray 5 and 6 about clipper ?
