Bug: mat_bloomscale values are wrong across the board.

[Rip-Rip-Rip]

Describe the bug

mat_bloomscale seems to act quite differently to in vanilla Portal 2.
It generally seems stronger? (Discussed internally here: https://discord.com/channels/1232515883461644310/1232676236548112454/1467271521205751860)

For comparison at mat_bloomscale 1.0 (r_ssao disabled in P2:CE for this demonstration):

P2:CE:

Portal 2:

To Reproduce

N/A - Just happens across the board with bloom enabled.

Issue Map

N/A - sp_a1_intro4 was used for the above screenshots.

Expected Behavior

Bloom should act the same as vanilla Portal 2.

Operating System

Windows 11 Home 25H2 Build 26200.7623