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[UWP][2018.4] Linear to gamma conversion error with HDR camera rendering over Main Camera with modified Viewport Rect

Steps to reproduce:
1. Download and open "new" scene
2. Switch platform to UWP and Build project
3. Build VS solution (x64, Debug, Local Machine)

Actual results: Player is brighter then In Editor or Standalone

Reproduced with: 2018.4.9f1 2017.4.32f1
Not reproducible with: 2019.2.4f1, 2019.3.0b3, 2020.1.0a4

- The issue was fixed in 2019.3.0a3 but it doesn't have a bug logged and wasn't backported to 2018.4/2017.4

To recreate the project follow these steps.
1. Graphic API for the target platform (UWP) must be left to default which is Direct3D11
2. Linear color space must be active.
3. The Main Camera that does the rendering must have its Viewport Rect modified.
4. Other Camera needs to have:
a) HDR enabled
b) Depth higher than Main Camera
c) Clear Flags set to Depth only
d) Culling Mask set to Nothing

If any of these settings aren't change the issue isn't reproducible.

  1. Response avatar

    Resolution Note:

    Doesn't meet the quality bar to backport to LTS

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