Remote play brightness/gamma changes on certain scaling mode and filter configurations

[durtroSC]

Your system information

• Steam client version: 1709168962
• SteamOS version: 3.5.17
• Opted into Steam client beta?: Yes
• Opted into SteamOS beta?: No
• Have you checked for updates in Settings > System?: Yes

Please describe your issue in as much detail as possible:

Scaling mode Fill and scaling filter Pixel result in higher brightness on streaming sessions. Scaling filter Pixel with scaling mode Integer does not have that higher brightness. Summing it:

• Scaling mode fill with any scaling filter is always brighter
• Scaling filter pixel is always brighter except when the scaling mode is integer

Steps for reproducing this issue:

1. Stream a game with remote play (in my case it was playing the game Distance): https://store.steampowered.com/app/233610/Distance/)
2. Change scaling mode and scaling filters and observe the brightness/gamma changes