big mirrors and fireflies

[Sharlybg]

I'had never experienced such kind of rigid noise+fireflies with my lighting workflow. most of the time people use such high clamping value. the problem is that you can't really know how high your clamping value is if you jus play with Luxcore natural Light/Camera/Clamping value.

In my system i never go behond 50 as clamping (i'm mostly arround 5 and 20). i don't loose good quality hilight because all my light have low value :

spot Power = between 2 and 10
spot efficacy = always 1
Camera simple Linear no auto = 1

Also My shader max white value is 80%.

Never use complexe geometry as emissive object or emissive object hidden behind glass.
Also SUN and SKY light are to powerfull for a "" LINEAR = 1 Camera"" So when i use them i set the gain to 0.0001.

BUT THIS IS THE WAY I WORK NOT THE WAY EVERYONE SHOULD WORK

[Dade]

I find the fireflies reflected on the mirror quite strange and I can not think to a reason to have them

But the fastest solution is just to use a bit of variance clamping and denoiser, they should easily handle that level of noise/fire flies.

[FarbigeWelt]

Some questions (again on mirrors...but not only)
Look at these pictures.

noise_01.jpg

noise_02.jpg

what should I have to do to make them cleaner?

Hello mercatore

Very nice, bright shoe shop.I like it.

In the first picture the noise at the wall comes probably from light reflecting at the cloth hangers and the metal bars, especially if the material roughness is above ~0.01.

Noise disappears slower in the mirrored room and even slower in regions of shadow. One looks through the mirror at the backside of the box and this side is in the shadow.

In some cases Metroplis instead of Sobol can help reducing noise. It may take up to 1000 samples. I guess Metropolis parameters for your store to start with are around 70%, 4096, 7.5%. You may use a second camera,close zoomed at a delicate positions and render smaller images (1920/4, 1080/4, you can enter it like that, Blender does the calculation for you).

You may also add invisible light planes (material Null, be aware of face normales direction) to reduce noise in the shadow backside parts.

Kind Regards,
FarbigeWelt

[Dade]

This is really strange:

ff.jpg (10.21 KiB) Viewed 3111 times

The sofa is both directly visible and seen on the mirror but the mirrored version has a lot of noise and fireflies. It doesn't make sense. Are you using a normal mirror material ? Can you send me a test scene with just he mirror and the sofa ?

[marcatore]

About the mirror material I've double checked and it's the mirror one.
About a simple scene I'll prepare and I'll send you as soon as I can.

Thank you.

[lacilaci]

hm..
Couldn't this issue be related also to my issue with that stupid sink noise?

[Dade]

hm..
Couldn't this issue be related also to my issue with that stupid sink noise?

May be but this a quite specific problem only in the reflected image ... that is quite odd.

[marcatore]

Dade, you have a PM with the reduced scene for your testing.

[Dade]

Dade, you have a PM with the reduced scene for your testing.

It misses the .ies file but doesn't matter. Your scene has 14563 light sources:

Code: Select all

[LuxCore][16.846] Building direct light sampling cache: filling cache entries with 14563 light sources

There are a lot of cylinder emitting lights:

Code: Select all

[SDL][6.918] The Mesh_Cylinder__10939_140473687367176003 object is a light sources with 32 triangles
[SDL][6.918] The Mesh_Cylinder__10939_140473687367176001 object is a light sources with 136 triangles
[SDL][6.918] The Mesh_Cylinder__10937_140473687364104003 object is a light sources with 32 triangles
[SDL][6.918] The Mesh_Cylinder__10937_140473687364104001 object is a light sources with 136 triangles
[SDL][6.919] The Mesh_Cylinder__10935_140473687361032003 object is a light sources with 32 triangles
[SDL][6.919] The Mesh_Cylinder__10935_140473687361032001 object is a light sources with 136 triangles
[SDL][6.919] The Mesh_Cylinder__10933_140473687333384003 object is a light sources with 32 triangles
[SDL][6.919] The Mesh_Cylinder__10933_140473687333384001 object is a light sources with 136 triangles
[SDL][6.919] The Mesh_Cylinder__10931_140473687330312003 object is a light sources with 32 triangles
[SDL][6.920] The Mesh_Cylinder__10931_140473687330312001 object is a light sources with 136 triangles
[SDL][6.920] The Mesh_Cylinder__10929_140473687327240003 object is a light sources with 32 triangles
[SDL][6.920] The Mesh_Cylinder__10929_140473687327240001 object is a light sources with 136 triangles
[SDL][6.920] The Mesh_Cylinder__040_140473686952456003 object is a light sources with 32 triangles
[SDL][6.920] The Mesh_Cylinder__040_140473686952456001 object is a light sources with 136 triangles
[SDL][6.921] The Mesh_Cylinder__10927_140473687324168003 object is a light sources with 32 triangles
[SDL][6.921] The Mesh_Cylinder__10927_140473687324168001 object is a light sources with 136 triangles
[SDL][6.921] The Mesh_Cylinder__046_140473686961672003 object is a light sources with 32 triangles
[SDL][6.921] The Mesh_Cylinder__046_140473686961672001 object is a light sources with 136 triangles
[SDL][6.921] The Mesh_Cylinder__044_140473686958600003 object is a light sources with 32 triangles
[SDL][6.921] The Mesh_Cylinder__044_140473686958600001 object is a light sources with 136 triangles
[SDL][6.922] The Mesh_Cylinder__042_140473686955528003 object is a light sources with 32 triangles
[SDL][6.922] The Mesh_Cylinder__042_140473686955528001 object is a light sources with 136 triangles
[SDL][6.922] The Mesh_NGon005__004_140473586264072003 object is a light sources with 4 triangles
[SDL][6.922] The Mesh_Line9850__004_140473687402504005 object is a light sources with 170 triangles
[SDL][6.923] The Mesh_Line9849__002_140473687399432005 object is a light sources with 170 triangles
[SDL][6.923] The Mesh_Line9848__002_140473687397896005 object is a light sources with 170 triangles
[SDL][6.924] The Mesh_Line9850__003_140473687400968005 object is a light sources with 170 triangles
[SDL][6.924] The Mesh_NGon005__003_140473586262536003 object is a light sources with 4 triangles
[SDL][6.925] The Lamp_Area__085_140474464375304000 object is a light sources with 2 triangles
[SDL][6.925] The Lamp_Area__084_140474464373768000 object is a light sources with 2 triangles
[SDL][6.925] The Lamp_Area__083_140474464372232000 object is a light sources with 2 triangles
[SDL][6.925] The Lamp_Area__082_140474464370696000 object is a light sources with 2 triangles
[SDL][6.927] The Lamp_Area__081_140474471541256000 object is a light sources with 2 triangles
[SDL][6.927] The Lamp_Area__080_140474471539720000 object is a light sources with 2 triangles
[SDL][6.927] The Lamp_Area__079_140474471538184000 object is a light sources with 2 triangles
[SDL][6.927] The Lamp_Area__078_140474471536648000 object is a light sources with 2 triangles
[SDL][6.927] The Mesh_Cylinder__10913_140473687321096003 object is a light sources with 32 triangles
[SDL][6.927] The Mesh_Cylinder__10913_140473687321096001 object is a light sources with 136 triangles
[SDL][6.927] The Mesh_Cylinder__10909_140473687318024003 object is a light sources with 32 triangles
[SDL][6.928] The Mesh_Cylinder__10909_140473687318024001 object is a light sources with 136 triangles
[SDL][6.928] The Mesh_Cylinder__10907_140473687314952003 object is a light sources with 32 triangles
[SDL][6.928] The Mesh_Cylinder__10907_140473687314952001 object is a light sources with 136 triangles
[SDL][6.928] The Mesh_Cylinder__10895_140473687311880003 object is a light sources with 32 triangles
[SDL][6.928] The Mesh_Cylinder__10895_140473687311880001 object is a light sources with 136 triangles
[SDL][6.929] The Mesh_Cylinder__10893_140473687288328003 object is a light sources with 32 triangles
[SDL][6.929] The Mesh_Cylinder__10893_140473687288328001 object is a light sources with 136 triangles
[SDL][6.929] The Mesh_Cylinder__10891_140473687285256003 object is a light sources with 32 triangles
[SDL][6.930] The Mesh_Cylinder__10891_140473687285256001 object is a light sources with 136 triangles
[SDL][6.930] The Mesh_Cylinder__10889_140473687282184003 object is a light sources with 32 triangles
[SDL][6.930] The Mesh_Cylinder__10889_140473687282184001 object is a light sources with 136 triangles
[SDL][6.930] The Mesh_Cylinder__10887_140473687279112003 object is a light sources with 32 triangles
[SDL][6.931] The Mesh_Cylinder__10887_140473687279112001 object is a light sources with 136 triangles
[SDL][6.931] The Mesh_Cylinder__10885_140473687276040003 object is a light sources with 32 triangles
[SDL][6.931] The Mesh_Cylinder__10885_140473687276040001 object is a light sources with 136 triangles
[SDL][6.931] The Mesh_Cylinder__10883_140473687272968003 object is a light sources with 32 triangles
[SDL][6.932] The Mesh_Cylinder__10883_140473687272968001 object is a light sources with 136 triangles
[SDL][6.933] The Mesh_Cylinder__10869_140473687269896003 object is a light sources with 32 triangles
[SDL][6.933] The Mesh_Cylinder__10869_140473687269896001 object is a light sources with 136 triangles
[SDL][6.933] The Mesh_Cylinder__10867_140473687266824003 object is a light sources with 32 triangles
[SDL][6.933] The Mesh_Cylinder__10867_140473687266824001 object is a light sources with 136 triangles
[SDL][6.933] The Mesh_Cylinder__10865_140473687243272003 object is a light sources with 32 triangles
[SDL][6.933] The Mesh_Cylinder__10865_140473687243272001 object is a light sources with 136 triangles
[SDL][6.934] The Mesh_Cylinder__10863_140473687240200003 object is a light sources with 32 triangles
[SDL][6.934] The Mesh_Cylinder__10863_140473687240200001 object is a light sources with 136 triangles
[SDL][6.934] The Mesh_Cylinder__10861_140473687237128003 object is a light sources with 32 triangles
[SDL][6.934] The Mesh_Cylinder__10861_140473687237128001 object is a light sources with 136 triangles
[SDL][6.934] The Mesh_Cylinder__10859_140473687234056003 object is a light sources with 32 triangles
[SDL][6.935] The Mesh_Cylinder__10859_140473687234056001 object is a light sources with 136 triangles
[SDL][6.935] The Mesh_Cylinder__10857_140473687210504003 object is a light sources with 32 triangles
[SDL][6.935] The Mesh_Cylinder__10857_140473687210504001 object is a light sources with 136 triangles
[SDL][6.935] The Mesh_Cylinder__10855_140473687207432003 object is a light sources with 32 triangles
[SDL][6.935] The Mesh_Cylinder__10855_140473687207432001 object is a light sources with 136 triangles
[SDL][6.936] The Mesh_Cylinder__10853_140473687204360003 object is a light sources with 32 triangles
[SDL][6.936] The Mesh_Cylinder__10853_140473687204360001 object is a light sources with 136 triangles
[SDL][6.936] The Mesh_Cylinder__10851_140473687201288003 object is a light sources with 32 triangles
[SDL][6.936] The Mesh_Cylinder__10851_140473687201288001 object is a light sources with 136 triangles
[SDL][6.936] The Mesh_Cylinder__10849_140473687198216003 object is a light sources with 32 triangles
[SDL][6.936] The Mesh_Cylinder__10849_140473687198216001 object is a light sources with 136 triangles
[SDL][6.937] The Mesh_Cylinder__10847_140473687195144003 object is a light sources with 32 triangles
[SDL][6.937] The Mesh_Cylinder__10847_140473687195144001 object is a light sources with 136 triangles
[SDL][6.937] The Mesh_Cylinder__10845_140473687192072003 object is a light sources with 32 triangles
[SDL][6.937] The Mesh_Cylinder__10845_140473687192072001 object is a light sources with 136 triangles
[SDL][6.937] The Mesh_Cylinder__10843_140473687189000003 object is a light sources with 32 triangles
[SDL][6.937] The Mesh_Cylinder__10843_140473687189000001 object is a light sources with 136 triangles
[SDL][6.938] The Mesh_Cylinder__10841_140473687165448003 object is a light sources with 32 triangles
[SDL][6.938] The Mesh_Cylinder__10841_140473687165448001 object is a light sources with 136 triangles
[SDL][6.938] The Mesh_Cylinder__10839_140473687162376003 object is a light sources with 32 triangles
[SDL][6.938] The Mesh_Cylinder__10839_140473687162376001 object is a light sources with 136 triangles
[SDL][6.938] The Mesh_Cylinder__10837_140473687159304003 object is a light sources with 32 triangles
[SDL][6.938] The Mesh_Cylinder__10837_140473687159304001 object is a light sources with 136 triangles
[SDL][6.939] The Mesh_Cylinder__10835_140473687156232003 object is a light sources with 32 triangles
[SDL][6.939] The Mesh_Cylinder__10835_140473687156232001 object is a light sources with 136 triangles
[SDL][6.939] The Mesh_Cylinder__10833_140473687153160003 object is a light sources with 32 triangles
[SDL][6.939] The Mesh_Cylinder__10833_140473687153160001 object is a light sources with 136 triangles
[SDL][6.939] The Mesh_Cylinder__10831_140473687150088003 object is a light sources with 32 triangles
[SDL][6.940] The Mesh_Cylinder__10831_140473687150088001 object is a light sources with 136 triangles
[SDL][6.940] The Mesh_Cylinder__10829_140473687147016003 object is a light sources with 32 triangles
[SDL][6.940] The Mesh_Cylinder__10829_140473687147016001 object is a light sources with 136 triangles
[SDL][6.940] The Mesh_Cylinder__10827_140473687143944003 object is a light sources with 32 triangles
[SDL][6.940] The Mesh_Cylinder__10827_140473687143944001 object is a light sources with 136 triangles
[SDL][6.940] The Mesh_Cylinder__10825_140473687120392003 object is a light sources with 32 triangles
[SDL][6.941] The Mesh_Cylinder__10825_140473687120392001 object is a light sources with 136 triangles
[SDL][6.941] The Mesh_Cylinder__10823_140473687117320003 object is a light sources with 32 triangles
[SDL][6.941] The Mesh_Cylinder__10823_140473687117320001 object is a light sources with 136 triangles
[SDL][6.942] The Mesh_Cylinder__10821_140473687114248003 object is a light sources with 32 triangles
[SDL][6.942] The Mesh_Cylinder__10821_140473687114248001 object is a light sources with 136 triangles
[SDL][6.942] The Mesh_Cylinder__10819_140473687111176003 object is a light sources with 32 triangles
[SDL][6.943] The Mesh_Cylinder__10819_140473687111176001 object is a light sources with 136 triangles
[SDL][6.943] The Mesh_Cylinder__10817_140473687087624003 object is a light sources with 32 triangles
[SDL][6.943] The Mesh_Cylinder__10817_140473687087624001 object is a light sources with 136 triangles
[SDL][6.944] The Mesh_Cylinder__10815_140473687084552003 object is a light sources with 32 triangles
[SDL][6.944] The Mesh_Cylinder__10815_140473687084552001 object is a light sources with 136 triangles
[SDL][6.944] The Mesh_Cylinder__10809_140473687081480003 object is a light sources with 32 triangles
[SDL][6.944] The Mesh_Cylinder__10809_140473687081480001 object is a light sources with 136 triangles
[SDL][6.945] The Mesh_Cylinder__10807_140473687078408003 object is a light sources with 32 triangles
[SDL][6.945] The Mesh_Cylinder__10807_140473687078408001 object is a light sources with 136 triangles
[SDL][6.945] The Mesh_Cylinder__10805_140473687075336003 object is a light sources with 32 triangles
[SDL][6.945] The Mesh_Cylinder__10805_140473687075336001 object is a light sources with 136 triangles
[SDL][6.946] The Mesh_Cylinder__10803_140473687072264003 object is a light sources with 32 triangles
[SDL][6.946] The Mesh_Cylinder__10803_140473687072264001 object is a light sources with 136 triangles
[SDL][6.946] The Mesh_Cylinder__10797_140473687069192003 object is a light sources with 32 triangles
[SDL][6.947] The Mesh_Cylinder__10797_140473687069192001 object is a light sources with 136 triangles
[SDL][6.947] The Mesh_Cylinder__10793_140473687066120003 object is a light sources with 32 triangles
[SDL][6.947] The Mesh_Cylinder__10793_140473687066120001 object is a light sources with 136 triangles
[SDL][6.948] The Mesh_Cylinder__10791_140473687042568003 object is a light sources with 32 triangles
[SDL][6.948] The Mesh_Cylinder__10791_140473687042568001 object is a light sources with 136 triangles
[SDL][6.948] The Mesh_Cylinder__10789_140473687039496003 object is a light sources with 32 triangles
[SDL][6.948] The Mesh_Cylinder__10789_140473687039496001 object is a light sources with 136 triangles
[SDL][6.948] The Mesh_Cylinder__10787_140473687036424003 object is a light sources with 32 triangles
[SDL][6.949] The Mesh_Cylinder__10787_140473687036424001 object is a light sources with 136 triangles
[SDL][6.949] The Mesh_Cylinder__10785_140473687033352003 object is a light sources with 32 triangles
[SDL][6.949] The Mesh_Cylinder__10785_140473687033352001 object is a light sources with 136 triangles
[SDL][6.949] The Mesh_Cylinder__10783_140473687009800003 object is a light sources with 32 triangles
[SDL][6.949] The Mesh_Cylinder__10783_140473687009800001 object is a light sources with 136 triangles
[SDL][6.950] The Mesh_Cylinder__062_140473687006728003 object is a light sources with 32 triangles
[SDL][6.950] The Mesh_Cylinder__062_140473687006728001 object is a light sources with 136 triangles
[SDL][6.950] The Mesh_Cylinder__060_140473687003656003 object is a light sources with 32 triangles
[SDL][6.950] The Mesh_Cylinder__060_140473687003656001 object is a light sources with 136 triangles
[SDL][6.950] The Mesh_Cylinder__058_140473687000584003 object is a light sources with 32 triangles
[SDL][6.950] The Mesh_Cylinder__058_140473687000584001 object is a light sources with 136 triangles
[SDL][6.951] The Mesh_Cylinder__056_140473686997512003 object is a light sources with 32 triangles
[SDL][6.951] The Mesh_Cylinder__056_140473686997512001 object is a light sources with 136 triangles
[SDL][6.951] The Mesh_Cylinder__054_140473686994440003 object is a light sources with 32 triangles
[SDL][6.951] The Mesh_Cylinder__054_140473686994440001 object is a light sources with 136 triangles
[SDL][6.951] The Mesh_Cylinder__052_140473686991368003 object is a light sources with 32 triangles
[SDL][6.952] The Mesh_Cylinder__052_140473686991368001 object is a light sources with 136 triangles
[SDL][6.952] The Mesh_Cylinder__050_140473686988296003 object is a light sources with 32 triangles
[SDL][6.952] The Mesh_Cylinder__050_140473686988296001 object is a light sources with 136 triangles
[SDL][6.952] The Mesh_Cylinder__048_140473686964744003 object is a light sources with 32 triangles
[SDL][6.952] The Mesh_Cylinder__048_140473686964744001 object is a light sources with 136 triangles
[SDL][6.953] The Mesh_Cylinder__038_140473686949384003 object is a light sources with 32 triangles
[SDL][6.953] The Mesh_Cylinder__038_140473686949384001 object is a light sources with 136 triangles
[SDL][6.953] The Mesh_Cylinder__036_140473686946312003 object is a light sources with 32 triangles
[SDL][6.953] The Mesh_Cylinder__036_140473686946312001 object is a light sources with 136 triangles
[SDL][6.953] The Mesh_Cylinder__034_140473686943240003 object is a light sources with 32 triangles
[SDL][6.953] The Mesh_Cylinder__034_140473686943240001 object is a light sources with 136 triangles
[SDL][6.954] The Mesh_Cylinder__032_140473686919688003 object is a light sources with 32 triangles
[SDL][6.954] The Mesh_Cylinder__032_140473686919688001 object is a light sources with 136 triangles
[SDL][6.954] The Mesh_Cylinder__030_140473686916616003 object is a light sources with 32 triangles
[SDL][6.954] The Mesh_Cylinder__030_140473686916616001 object is a light sources with 136 triangles
[SDL][6.954] The Mesh_Cylinder__028_140473686913544003 object is a light sources with 32 triangles
[SDL][6.954] The Mesh_Cylinder__028_140473686913544001 object is a light sources with 136 triangles
[SDL][6.955] The Mesh_Cylinder__026_140473686910472003 object is a light sources with 32 triangles
[SDL][6.955] The Mesh_Cylinder__026_140473686910472001 object is a light sources with 136 triangles
[SDL][6.955] The Mesh_Cylinder__024_140473686886920003 object is a light sources with 32 triangles
[SDL][6.955] The Mesh_Cylinder__024_140473686886920001 object is a light sources with 136 triangles
[SDL][6.955] The Mesh_Cylinder__022_140473686883848003 object is a light sources with 32 triangles
[SDL][6.956] The Mesh_Cylinder__022_140473686883848001 object is a light sources with 136 triangles
[SDL][6.956] The Mesh_Cylinder__020_140473686880776003 object is a light sources with 32 triangles
[SDL][6.956] The Mesh_Cylinder__020_140473686880776001 object is a light sources with 136 triangles
[SDL][6.956] The Mesh_Cylinder__018_140473686877704003 object is a light sources with 32 triangles
[SDL][6.956] The Mesh_Cylinder__018_140473686877704001 object is a light sources with 136 triangles
[SDL][6.957] The Mesh_Cylinder__016_140473686854152003 object is a light sources with 32 triangles
[SDL][6.957] The Mesh_Cylinder__016_140473686854152001 object is a light sources with 136 triangles
[SDL][6.957] The Mesh_Cylinder__014_140473686851080003 object is a light sources with 32 triangles
[SDL][6.957] The Mesh_Cylinder__014_140473686851080001 object is a light sources with 136 triangles
[SDL][6.957] The Mesh_Cylinder__9822_140473687370248003 object is a light sources with 32 triangles
[SDL][6.958] The Mesh_Cylinder__9822_140473687370248001 object is a light sources with 136 triangles

I can not even get out of the pre-processing with that amount of light sources. It is really a bad idea and I assume it was an error.

[marcatore]

This is the IES file.

60714901_(STD_LEO).zip

(667 Bytes) Downloaded 113 times

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.

Anyway, I'll try to set a simple matte material and check if fireflies still present.

In any case I'm feeling I'm in a loop. I'll explain after this last test.