LuxCoreRender Forums

It is working now and here are the result : Bidir reference ar__24+16__Bidir__deph.png DEFAULT / RR start 3 strengh (0.5) deph 40 default__RR(0.5_3)__40d.png DEFAULT + PGI / RR start 3 strengh (0.5) deph 40 default+ PGI__RR(0.5_3)__40d.png No RR total deph 40 No__RR__40d.png As you can see default r...

Have you increased the max. photon bounces ?

P.S. BiDir default max. is 16, PGI is 4

Photon deph was set to 40 to avoid any bottleneck :

The properties are described here: https://wiki.luxcorerender.org/LuxCore_SDL_Reference_Manual_v2.3#.22PATHCPU.22 You're probably looking for "path.russianroulette.depth" and "path.russianroulette.cap". In the addon, you can add these here for testing: https://github.com/LuxCoreRender/BlendLuxCore/...

It is a value between 0.0 and 1.0: higher it is and less likely RR will be applied (1.0 => never applied). It is based on the material luminance: RR applied to small values tends to cause fireflies. Btw for simplicity this value can be named ""RR strenght"" while we inverse the behaviour : higher i...

By the way before i change anything in RR default setting here is the light quality difference between Path+PGI vs Bidir . Note how natural / bright / and progressive is the light from Bidir engine . Bidir ar__24+16__Bidir__deph.png Pathocl+ Pgi ar__40__path__deph.png theses kind of light treatment ...

It is a value between 0.0 and 1.0: higher it is and less likely RR will be applied (1.0 => never applied). It is based on the material luminance: RR applied to small values tends to cause fireflies.

it is very well explained thanks you !

thanks you BYOB for this nice input. going to try this now. Btw i can understand this feature : path.russianroulette.depth : The path depth where Russian Roulette stars to be used but this one i don't really catch it : path.russianroulette.cap : The threshold over which Russian Roulette is used thre...

Just continue my testing journey . now while trying to see how much brightness/light detail i can get while increase path deph (same number for all diffuse/glossy/specular) : 8 ar___8_total__deph.png 16 ar__16__total__deph.png 64 ar__64__total__deph.png 128 ar__128__total__deph.png Was now feeling t...

P.S. and I must admit I don't see any flickering in this one: viewtopic.php?f=4&t=1688&start=10#p19307

same here.

but it is probably this one :

https://streamable.com/d30uq

But maybe this was already fixed i haven't really follow this thread well.

This is very very nice news thanks Dade for sharing. Also they say they are themselves VFX artists so will be nice to know some of the motivation behind Luxcore support.