Juraj: How do I turn on adaptivity to get rid of that noise? Is it something already implemented on A5?
Maru: I took that map off, it was a sort of PNG dirt map. I left the walls white and add some reflection, the white color is RGB 180, as a proper albedo. The thing is that even now without the maps in the reflection slot, it still takes ages to clean that area and it's never as clean as the rest of the walls or the overal render. You will see that clearly on the next render I'm about to post. I left it rendering overnight, it was 3393 passes for 8:30 hours and although now the noise is quite better, there's still diferences between the other areas that are very smooth and noise free.