LuxCoreRender Forums

epilectrolytics wrote: ↑Sat Jul 06, 2019 8:54 pm Good modelling and nice setting but the inhomogeneous light cone looks weird (in both versions).

Thanks, and you're right... I wanted some variance in the lightbeam, so I used heterogeneous volume with a noise pattern, but It didn't become the best.

I modelled the optics to be physically correct. It has a small LED and a TIR (Total Internal Reflection) lens. BiDir Metropolis (2850 samples): FlashLight-bidir-metropolis.jpg Hybrid (also on CPU, 4470 samples): FlashLight-hybrid-sobol.jpg Both were denoised with OIDN. Hybrid seems to be faster (in ...

So for unbiased SDS paths the emulation of camera/image/pixels plane would be necessary?

Sharlybg wrote: ↑Wed Jul 03, 2019 4:12 pm I mean that the hybrid approach is already faster in final frame rendering...

It seems to me too (compared on CPU only).

(But unfortunately the result isn't the same.)

Do you believe I'm doing something wrong, or is CPU only not dead yet? I think classic BiDir is definitely not dead yet. Hybrid PT is the most exciting development for me in LuxCore, but there are still problems with it. - It's a known limitation, that it can't do SDS paths. Dade says, that BiDir c...

Nice!

As several people have already mentioned, and also visible in the test images, volumetric lights looks much brighter with hybrid PT than with BiDir.

Isn't this the same kind of thing, that was before with glossy reflections that these are handled with path tracer and light tracer too?

It is a known limitation, there from day one of laser/laser-like light source support. Hybrid can now render the light scattered after the mirror bounce (i.e. the caustic path). Light tracing could be used to fill this particular "hole" in normal path tracing too but it is not one of my t...

As I know Disney roughness = sqrt(glossy roughness), so it could be easily computed.

Disney material already includes a metal component so it doesn't make any sense to mix with metal (or glossy2).

It would be better to keep the opportunity for creative control IMHO.

Dade wrote: ↑Thu Jun 27, 2019 7:55 am Are you sure to use the latest binaries ? Can you post a test scene ?

I've downloaded the binaries again, but it's the same.

BiDir (sobol):

Hybrid: