LuxCoreRender Forums

lacilaci wrote: Tue May 28, 2019 7:32 am I also wonder, why is the sunlit area noisy? Shouldn't that part be like instant clean?

I guess, it's how simple path is, it may be visible for bidir.
Still the cache does good job and with MLT and PhotonGI even better.

lacilaci wrote: Tue May 28, 2019 7:32 am I also wonder, why is the sunlit area noisy? Shouldn't that part be like instant clean?

Might be caused by the lightstrategy - my guess is that with "Power" or "DLSC" it would be clean much faster?

B.Y.O.B. wrote: Tue May 28, 2019 8:54 am

lacilaci wrote: Tue May 28, 2019 7:32 am I also wonder, why is the sunlit area noisy? Shouldn't that part be like instant clean?

Might be caused by the lightstrategy - my guess is that with "Power" or "DLSC" it would be clean much faster?

It is more related to this HDR and resolution of the visibility map: the HDR has a single pixel with a HUGE value (i.e. the sun) and having a map resolution high enough to aim the single pixel is not trivial. Using sun+infinite light (i.e. "extracting" the sun pixel from HDR) would produce an instant noise free rendering (this process could be done even automatically ).

Ah, I assumed it was sun + HDRI.

B.Y.O.B. wrote: Tue May 28, 2019 9:45 am Ah, I assumed it was sun + HDRI.

Me too, or sky+sun. Kinda didn't even think that this is hdri only.

So does this mean that the artifacting around sunlight is cause envlightmap cache being built from limited resolution? Would I avoid these artifacts by using sun&sky or constant color + sun?

lacilaci wrote: Tue May 28, 2019 10:01 am So does this mean that the artifacting around sunlight is cause envlightmap cache being built from limited resolution? Would I avoid these artifacts by using sun&sky or constant color + sun?

Yup.

If Simon add the enable flag to Blender, you can try it.

Does the cache replace the old visibility map, or should both still be available in the UI?

B.Y.O.B. wrote: Tue May 28, 2019 10:43 am Does the cache replace the old visibility map, or should both still be available in the UI?

It doesn't, it is an additional option (the pre-processing require far more time and memory than the old visibility map, so the old could be still useful).

To give you an idea, this is the same scene with sky only light source, normal:


with the new cache:


It is really like night and day.