LuxCoreRender Forums

Hm.. I'm getting way better performance with the constantlight fix, but there are still issues... So I'm testing out my interior scene with env.visibility cache and I'm constantly running out of VRam (8gb rtx2070). Mostly when I get close to some objects, then I move camera a bit and it works again....

Ah, nice

Hi, What are the camera values you're using that you get dark sun&sky. Sun and sky is actually way more stronger in luxcore than in cycles for example and you might even need very high clamping values so that you won't cut off too much power (like 100000 or similar) As for camera settings, if I ...

Sharlybg wrote: ↑Thu Aug 01, 2019 4:32 pm

lacilaci wrote: ↑Thu Aug 01, 2019 4:17 pm That's a big improvement!

As Dade said that it was a constant infinite light problem only i wonder how Luxcore Compare to cycles with HDRi in your broken scene ?

If glossiness threshold is removed so that the glossy objects are included it should be fine... Won't have time to test though.

That's a big improvement!

I currently only have the "free tier" licence on octane but even before I haven't seen option to enable rtx (I assume it's always on by default?) But cycles with scrambling and blue noise dithering can come very close to the performance even without rtx... But still octane is a bit faster....

I think the same problem happens when you have a single object+hdri+env.cache enabled.. cause the reflections tend to look very noisy as well.
But it might be unrelated.

Yeah, I'll try to keep it more focused next time. PGI is definitely not the source of problems here..

I think it's a combo of env. cache + glossy materials, or just env.cache problem.

Yes, some more people I've seen report around 2x speedup in complex scenes, simple ones don't benefit too much from optix... There are few patches that should optimize cycles even more, waiting for review and implementation. Especially blue noise dithered sobol, adaptivity and distance scrambling......

So I was exploring a little what is causing such problems for luxcore in my scene and I kinda recreated the issue simplified.. It's basicaly poor performance with highly glossy bright object within a dark environment. For several reasons, but biggest problem is that the glossy object won't get much ...