Hello i am having trouble understanding how the 'mix shader' node actually works and more specifically why mix 2 identical nodes? For example: why is there a different result between using a glossy shader then mixing 2 glossy shaders with the same color and the same average roughness? what does mix shader actually do? average(with factor) the pixel color returned by each shader? i see people mixing 2 glossy shaders claiming it looks better since it gives a different roughness distribution, but i am curious to what is happening behind the scenes and what is actually the 100% PBR way.
What's the point of mixing the same shader types?