LuxCoreRender Forums

chuchur wrote: ↑Wed Aug 18, 2021 1:36 pm I just wonder what kind of event types i could use for Disney in GetEventTypes and Sample/Evaluate methods?

For Glass material we have SPECULAR | REFLECT| TRANSMIT and for Disney without transmission we have GLOSSY|REFLECT.

GetEventTypes() should return all type of events possible. In your case, it should be GLOSSY|REFLECT or GLOSSY|REFLECT|TRANSMIT if the transmission texture is not black.

chuchur wrote: ↑Wed Aug 18, 2021 1:36 pm Should it be for Disney with transmission GLOSSY|SPECULAR|REFLECT| TRANSMIT in GetEventTypes ?

As far as I remember the Disney transmission is still glossy, not specular. Don't they use some kind of GGX distribution for transmission too ? To have rough glass, etc. ?

chuchur wrote: ↑Wed Aug 18, 2021 1:36 pm And in Sample/Evaluate GLOSSY|REFLECT for reflected path and SPECULAR|TRANSMIT for refracted path?

Yes, Sample/Evaluate events are what actually happen in this specific call (aside from the Glossy Vs Specular transmission detail I don't remember).

Don't they use some kind of GGX distribution for transmission too ?

you are right, it is SampleGgxVndfAnisotropic. So, I'll take GLOSSY|REFLECT|TRANSMIT for GetEventTypes.

I guess I've almost finished the CPU part. Hope, I could commit my code soon.

chuchur wrote: ↑Wed Aug 18, 2021 2:14 pm

Don't they use some kind of GGX distribution for transmission too ?

you are right, it is SampleGgxVndfAnisotropic. So, I'll take GLOSSY|REFLECT|TRANSMIT for GetEventTypes.

I guess I've almost finished the CPU part. Hope, I could commit my code soon.

Really Nice to see Help in this area Bravo

Sharlybg and Dade,

thank you for your motivation! I'll come next week back from the holidays to make it final

Thanks for this Churchur! this will be helpful for sure!

Hi! I'm sorry for my long absence (was busy with work project).

I'm transferring slowly math from Selas Project https://github.com/schuttejoe/Selas https://github.com/schuttejoe/Selas/blo ... Disney.cpp) into Lux.

Just want to be sure I'm doing all right:

Do we have axis Z normal to the surface direction? In Selas it is Y.

chuchur wrote: ↑Mon Oct 11, 2021 9:18 am Do we have axis Z normal to the surface direction? In Selas it is Y.

Yes, it is like PBRT.