Strange splotches after rendering

[gyuguygguyg]

Hello I am rendering exterior scene, and found these splothes on houses. I am using standard vray physical camera with standard parameters. I tried increasing samples in GI irradiance map and light catch, didn't work. I don't know what to do... I included render pictures and my used settings in attachment.

Extra notes:

Lighting system -

Vray sun,

Vray sky,

2 domes: 1 reflections, another diff.

Edited December 17, 2017 by gyuguygguyg

[Andrew _GF]

Try to render with only IRR Map + BF and LC + BF to see if this i caused by LC or Irr. I think it is IRR, you have set the subdvs and interp samples to high values but you render at -4 -3 resolution. If you are rendering in low resolution then it can be not enough. Try to render with -2, 0 and see if it helps.

 

Also it can be caused by models, are they modelled originally in 3ds max or they are imported from Archicad in example?

Edited January 4, 2018 by archman