Stencil camera angle makes the walls behind it invisible

[linqiaozhi123]

Tested versions

4.5.stable,

System information

cpu:AMD9600X,gpu:Inter ARC B580,vulkan

Issue description

I'm making a portal, and I'm using a stencil to see through the walls in the portal view, but the portal shader has an opacity area that makes the walls behind it invisible to the player's view, and the bug only occurs when the portal is viewed from a certain angle. it seems to have something to do with the stencil, the camera angle, and so on.

Steps to reproduce

wall:

portal(01.gdshader):

Minimal reproduction project (MRP)

One Portal.zip

[timothyqiu]

the bug only occurs when the portal is viewed from a certain angle

Judging by the description, I think adjusting the Render Priority of the material should fix it.

[linqiaozhi123]

the bug only occurs when the portal is viewed from a certain angle

Judging by the description, I think adjusting the Render Priority of the material should fix it.

After adjusting the render priority of the material the problem of the wall disappearing has been solved, but I don't quite understand why this extra step needs to be done, it could still be considered a bug?