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Won't Fix

Votes

0

Found in

2017.4

2018.4.16f1

2020.2

Issue ID

1217627

Regression

No

[Mac][Metal] Camera "Clear flags" set to Don't clear still clears in Mac build when using Metal graphics API

MacOS

-

Reproduction steps:
1. Open the project from the attached file "1217627.zip"
2. Build and run the project setting the target platform to Mac
3. Inspect the screen

Expected result: while the camera is moving frames are drawn without clearing the last drawn frame
Actual result: while the camera is moving the last frame is cleared before drawing a new frame

Reproducible with: 2017.4.38f1, 2018.4.19f1, 2019.3.6f1, 2020.1.0b2, 2020.2.0a4

Notes:
- Not reproducible in Editor
- Only reproducible when using Metal graphics API
- Not reproducible on VLNQA00160 iPhone 6S iOS 13.3.1 with Metal API

  1. Resolution Note (2020.2.X):

    "Expected result: while the camera is moving frames are drawn without clearing the last drawn frame"
    This is NOT an expected behavior. The contents of backbuffer are unspecified after the frame ended. Some apis allows you to have "whatever was rendered in the previous frame" but this is not a general behavior, so backbuffer must be cleared at frame start. It is different in editor simply because we render to RenderTexture, not to the screen. If the same is done in player (but you need an explicit RT, sure) than it will work as expected

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