LuxCoreRender Forums

This is with a matte material without emission.
As you can see the log don't inform me back about too much light sources. Fireflies on the mirror still present.

marcatore wrote: Wed Jul 31, 2019 10:38 am About the light sources, that are the emitter object for the light reflector as suggested by BYOB.
They have a very low gain that shouldn't partecipate to the general lighting.

As BYOB wrote, you need to disable direct light sampling for that emitters otherwise is a HUGE amount of additional computation.

Dade wrote: Wed Jul 31, 2019 11:11 am As BYOB wrote, you need to disable direct light sampling for that emitters

You can do this by setting the "DLS" mode from "auto" to "disabled":

Disabling the emission of all area lights works flawless:


So the problem is with one of the area light, trying to track which one.

How did you disabled the emission of the area light?

About the option to disable the emission material from the DLS it's already set as "disabled"

These 2 materials "Vivo_lampada" and "Vivo_riflettore" are the 2 in the inner part of the light fixture.

The source of the problem are the slim area lights:


If you disable visibility in indirect bounce (viewtopic.php?f=4&t=1235#p14825), the fireflies go away.

From the BYOB answer (viewtopic.php?f=4&t=1235#p14834), this is not currently possible with Blender. The BYOB's statement about MIS is correct in general however there is here an interaction between DLSC and MIS that required that flag.

So I would just add area light to the list of light sources where the panel is shown:

Dade wrote: Wed Jul 31, 2019 12:26 pm If you disable visibility in indirect bounce (viewtopic.php?f=4&t=1235#p14825), the fireflies go away.

From the BYOB answer (viewtopic.php?f=4&t=1235#p14834), this is not currently possible with Blender. The BYOB's statement about MIS is correct in general however there is here an interaction between DLSC and MIS that required that flag.

So I would just add area light to the list of light sources where the panel is shown:

So, if I've correctly understood, at the moment I cant' do as much as I did. Correct?

Just to know

marcatore wrote: Wed Jul 31, 2019 12:13 pm How did you disabled the emission of the area light?

About the option to disable the emission material from the DLS it's already set as "disabled"

It was the result of a bug while exporting the setting to file, it was set for you but it wasn't on my receiving end (the value wasn't exported so the default value was instead used). I should have fixed the problem.

marcatore wrote: Wed Jul 31, 2019 12:37 pm So, if I've correctly understood, at the moment I cant' do as much as I did. Correct?

You could export the scene and edit the scene by hand but it is cumbersome. Just wait for a BlendLuxCore updated version, it should require to modify only one line of code.

Ok. Surely I'll wait. Luckly it's just a test scene, so I don't have a deadline.

I'll wait and check.

thank you for your support.