Bug: Exporting screenshots at resolutions higher than current game resolution makes water display incorrectly

[pivotman319-owo]

Describe the bug

Taking screenshots using the png command at a viewport resolution that is higher than the game's current screen resolution will cause projected water refractions to vertically scale incorrectly throughout the entire framebuffer.

Exporting at 1920x1080px (native resolution):

Exporting at 3840x2160px (2x native resolution):

To Reproduce

1. Launch game with -w 1920 -h 1080
2. Launch any map with water; the base Portal 2 maps from a1-a3 have plenty of reflective water
3. Move and look directly at a water surface
4. Spew current ingame framebuffer by invoking png 3840 2160 test
5. Check the spewed framebuffer in mod screenshots directory

Issue Map

N/A

Expected Behavior

Water should be displaying correctly at higher export resolutions

Operating System

Not Applicable

[Gocnak]

Can you test this on the next release? A potential fix was merged recently.