Mirror render - artefacts

[wojciechgrabowski]

Hello,

 

I'm working on visualisation of the bathroom. I'm playing with options in Vray 3.0 (with Max2014)

I've made few attempts. In the end I don't know why on mirror and tiles appear these problems.

 

It's the first render (with ImageSampler filter = Area)

 

 

And the region rendered again (with Mitchell-Netravali)

 

Here's my render setup:

 

Thanks in advance,

WG