And you used normal cycles,B.Y.O.B. wrote: ↑Mon May 06, 2019 12:38 pm I also find that soft shadows take forever to clear up in LuxCore in this scene, for example the area on the right.
I have tried to make the LuxCore and Cycles setups match more:
- removed the sun (hard to get same brightness)
- disabled clamping
- set Cycles to direct light only
- set Cycles background to same settings as LuxCore (white color, gain 150)
- created portal for Cycles (on layer Alt+1)
- set both to 100 samples (not comparable, but at least in same ballpark)
- disabled denoising
Here is a comparison between Cycles and LuxCore after these changes:
e-cycles is over 50% faster and much cleaner with lower sample count and you can even use dithered sobol + ray scrambling to further increase performance and noise uniformity... And new cycles adaptivity will make things even faster yet...
And keep in mind this is still a very simple scene, where direct light shadows can be easily hidden with GI caching. But a relatively dark interior with complex reflective surfaces can make Direct light shadows very prominent and visible and luxcore might not be even able to get acceptable noise levels.
This means you will get sometimes bigger and sometimes smaller areas with a heavy noise that will look terribly even after denoising. I've seen this in some testscenes, in my office project, in my latest project where due to this issue I went for e-cycles instead...
I think it is just visibility map being an inferior solution for certain cases against portals. But it might be a bug or something idk...