Bug: screenshot and jpeg commands produce dark screenshots

[damqn4etoBG]

Describe the bug

When you run 'screenshot' or 'jpeg' in the console it produces a much darker screenshot than what is rendered on the screen

To Reproduce

Run 'screenshot' or 'jpeg' in the console
See results

Issue Map

Occurs on every map, even in the menus
The map in the provided screenshots is sp_a1_intro3

Expected Behavior

When you run 'screenshot' or 'jpeg' in the console, it should produce a normal screenshot like this in Portal 2:

Operating System

Windows 10