Additional camera with a render texture causes horizon line

[KasperSeas]

Describe the bug
Once a second camera is added with render texture, the horizontal line bug appears. This has been done in the main scene in the examples. I don't think this is related to #456 since render texture wasn't mentioned.

Screenshots / video
This is what the horizon line artifact looks like.

These are components of the duplicated camera. Once the "ScreenProjectorRT" render texture is added, the line appears.

Log
There are no warnings or errors

Versions
In Unity 2020.1.5f1, using HDRP 8.2.0, Crest Ocean System HDRP 4.5.0

To Reproduce
-You can reproduce this by duplicating the DemoCamera in the main scene in examples.
-Change duplicated camera output target display to Display 2 and Depth to 1
-Create and add render texture to duplicated camera's Target Texture.
-Remove Cam Controller and Lerp Cam scripts from duplicated camera
-Press play
-Go underwater add see the horizontal line

Platform

• in Editor
• Platform: win

Hardware
Processor: intel core i5-6600k
gpu: nvidia geforce gtx 1080

Additional context
none

[daleeidd]

Does it still happen if you remove the MainCamera tag from the duplicated camera?

[KasperSeas]

Hey deleeidd, yes it does still happen. It's not shown in the screenshot above but I just tried it rn

[daleeidd]

@KasperSeas sorry we haven't gotten around to this. Is it still an issue?

[psychoclast]

Yes, I'm having this issue too. I use a secondary camera underwater for a sonar effect.

[daleeidd]

Pretty sure this is solved with 4.16. It adds support for multiple cameras.