White splotches issue, exterior render settings

[decumano]

Hi... and good sunday!

I'm working on a override materials image for an exterior render. I think my settings are good quality, but of course it's not so. As you can see there are splotches in the red rectangle.

Is that a general settings issue? A shadow quality issue? An ambient occlusion issue?
Those are my settings
Thanks!

[decumano]

mhmmm
so, can't anyone help me?

Really, I can't understand where this settings are wrong..

[koenvdw]

Have you tried to reduce the noise threshold? You find it under DMC sampler.
I use 0.002.