How can I get rid of these bad pixels during rendering? Sorry when I'm duplicating thread, I've seen something about that, but now I can't find it.

Check your material on the roof and see if it has a lot of reflection.  To me it looks like the sunlight may be causing that. 

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In Imagine3D it would be called specularity but I think Vue has it on the highlights Tab...set all to zero or a colour you want to see,and it will either go away or be improved if you add an appropriate colour. The higher the number the brighter and smaller the highlight, and lower numbers, non zero ones, will spread it over the whole surface if it operates anything like Imagine3D. IIRC the parameters are dull to shiny.

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again

 

 

 

 

 

I think you have too high highlight values in the roof tiles material.