Denoising - very poor performance with Corona lights Vs Sun&Sky

[romullus]

I noticed that in one of my scenes denoising delivers very dissapointing results when that scene is lit with Corona lights. OTOH it works perfectly fine when that same scene is lit with Corona sun and sky. Wonder what could be reason for such a difference?

Rendered couple crops as example and made gif alternating denoised vs not denoised versions. Both crops where rendered under same conditions: 100 passes, both took about the same time to render, both have similar brightness, both reached very small noise level - 0,3-0,6%.

[Ondra]

the gifs are really low quality, could you post just individual images?

[romullus]

Sure, attaching original images. Those crops are very low-res though. I can re-render at bigger resolution or just send whole scene to you if it helps.

[Ondra]

ok, please send the scene to mantis. Thanks

[sprayer]

for me denoising add more fireflies. would be great if you add to turn on only denoise without removing firefly's for that reason

[romullus]

Care to show some examples where denoiser adds fireflies? Curious to see.

[sprayer]

Care to show some examples where denoiser adds fireflies? Curious to see.

it add in full denoise mode. in mode only remove fireflys works better

[Ondra]

can you send us the scene? we will be able to fix this if we have it.

[sprayer]

can you send us the scene? we will be able to fix this if we have it.

i am sorry, it was WIP scene and now i can't reproduce it, it is something with denoising algorithm what shades the the area

here how it looks now, this scene i can send to you

[sevecek]

i am sorry, it was WIP scene and now i can't reproduce it, it is something with denoising algorithm what shades the the area

here how it looks now, this scene i can send to you

Hi,
can you please share this scene? You can use private uploader if you wish.