Open the folder "Portal 2 - Ultra Graphics Mod 2020 (1.0)"
Go to "C:\Program Files (x86)\Steam\steamapps\common\Portal 2\bin" 
And place all the files in it
Enjoy ;) Riverten.
How to install (Eazy)
Here is a tutorial to install Ultra Graphics Mod 2020
Posted by riverten on - Basic Installers
Where do I download the files for the mod?
Moddb.com
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It did not work... I see no difference
when i go to common there is no portal 2
You have to have the Portal 2 bought and installed in your computer, duh?
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after copying the files and running the game I see absolutely no difference. that's a bummer.
It doesn't work for me.. :c What should I do?
well, cool
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You need for this the reshade.exe!
Here you can Download it: Reshade.me
are you sure its a file? its a RAR file, not just a standard one
nevermind i converted it to a zip and extracted said zip and it had all the files