I keep finding dark spots all over my renders when I activate GI (c.f. 1st image). The only solution I found is to bring the smoothing up to 200% (c.f. 2nd picture), but this doesn’t seem like a durable solution as it need crazy render time and seems to create some kind of blurriness. Would anyone have to miraculous ingredient to my issue?
I am enclosing my render settings. The lighting come from a default HDRI sky.