Hello, here it is - new image but having setting like wrote above it's still noisy.
I think it's the because of my walls has no textures, just grey colour.
I'm sure that wallpaper will change the situation, but I'd like to see the walls painted it white
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cooler_inc_view_05.jpg (233.93 KiB) Viewed 1114 times
Dimm the spot/ies a lot, its way too strong compared to sun. A tremendous light energy is equivalent to using saturated colors, noise wise.
Possibly add some soft light source(s) near the wall opposed to the window.
Your biggest concern now is not walls or materials, you did that well. It's now... to balance lights ! Leave reinhard tm alone and use linear or camera tm for this purpose.