Noise in diffuse direct Pass with IES Lights Tweet

[Wael]

Hi everyone !

I'm having massive issues with noisy lights, I've got a big exterior scene which requires a lot of lights on a building facade. Now I know that the more lights you have the more likely you are to get a noisy image and accordingly you need to bump up the kernels but I am only getting the noise from IES lights. When I look at the render passes the noise is only visible on the Diffuse Direct Pass and the Diffuse Indirect Pass has pretty much no noise at all. Even cranking the kernels way up doesn't seem to fix the issue and I've got the samples quiet high for the IES lights. This has been render using PathTracing at 6000 kernels.

Has anyone ever encountered that kind of issues with IES lights ? Let me know if you need anymore info
Thanks for you help !

Sorry for the image resolution but I'm not allowed to show the full image for confidential reasons