How to make glass more reflective? So I created a space scene and I have a glass windows on one of the shuttles.
I want this window to be extremely reflective and glossy. Kind of like it just got waxed, polished, then polished again. When using a glossy shader, I almost achieve this:

Notice how the reflection is just as bright as the image itself

The problem here is that the glass isn't transparent. This is what happens when I use the glass shader:


How do i make it more reflective but still transparent?
The correct way to add reflective coating is to mix in a Glossy shader through Fresnel:



This is what it does - it coats the surface with more reflection, becoming fully reflective at grazing angle (it is influenced by the Fresnel IOR):



The result is less-transparent more-reflective, denser looking glass. Which can be done with glass IOR itself as glass already has reflection:)

But we can apply this generally to any shader, to add a reflective coating (clear-coat) on top. Such coating is usually so thin it is fully transparent and only it's reflective properties matter (the reflection is of dielectric nature - so white).

This has also the benefit of ability to change the base reflectance of the coating if really needed. Here, let's have base reflectance just 20% of the normal Fresnel node (also note that base reflectance of dielectrics don't change much):