spots in Irradiance map

[uzi be]

Hi,

I get these weird spots sometime in the final images (they constant and not flicker)
I guess it from the pre pass Irradiance map (i tried LC+BF and i don't get them)
It happens especially near windows

I'm using vray sun/sky + vray light sky portal (with store with irradiance map)
v-ray 3.6 on max 2017.
My preset is LC+IM (medium animation)

Anyone has any idea?

[hristo.dimitrov]

Can you send your scene to support@chaosgroup.com for investigation?

[uzi be]

Can't share the file.
But i noticed that it happens on thin objects need light source. In this case light portal with save with irradiance map checked

[hristo.dimitrov]

Can you confirm that the issue still appears if you disable store with irradiance map option on your light portals?

[uzi be]

Found the problem. It's a light cache issue. I needed to increase the retrace to 8 in the light cache setting