I actually started with that first tutorial. It's not shit. I admit there's lotsa shortcuts you can make but at least it teaches you some useful techniques and tools. Anyway here's something...
Change - render - environment (to different colour) and then if you see that half is white and other half is your chosen colour then you must change also the color in Brazil renderer settings (dont remember).
Man dont be funnyguy, search for proffessional Blender renders. Every renderer has its best renders. We all are making .... together compared to proffessional dudes And its not quite right too like we others have too. Window glass should reflect the nature on the other side but for that you need to make HDRI etc.
Yea ofcourse the limitation of ingame cars (lowpoly) sets us a bar, but realism is good vision to try to achieve. I am perfectionist or try to be and it isnt bad.
If you guys want I can show some renders which are so real that I couldnt understand it is real or cg.
Some people are not seen what I have seen, so yea I am sometimes so annoying.
I like realism and it the dream of every cg guy. If you like some ordinary renders use Brazil and good luck.
Gustix makes wonders with Blender, but still a great road to go, like me and others. As you can see he has put a big effor in them, but the glass material brings it a bit down. It would be 99% correct tho.