Opengles 2.0 BUG BackBufferCopy child node, change the ZIndex buffer to screen cache. BackBuffer Copy cannot be sampled correctly

[cjmxp]

Godot version:
3.2 dev

OS/device including version:
windows N 1080ti opengles 2.0

Issue description:

BackBufferCopy child node, change the ZIndex buffer to screen cache. BackBuffer Copy cannot be sampled correctly

[Calinou]

Can you upload an example project so we can try reproducing the issue?

[cjmxp]

@Calinou Tomorrow I'll write a demo.

[cjmxp]

Opengles 2.0 Reproducible Opengles 3.0 No problem

[cjmxp]

demo backbuffercopy-bug.zip

[cjmxp]

@reduz 3.1 This problem also exists.

[Calinou]

@cjmxp According to your last comment, this issue still appears to be present, so I'll reopen it.

[groud]

I encountered several such issues, which were ignored and solved without marking the version.

There are almost 2000 other bugs opened (and almost 5000 issues), please stop thinking that contributors do not care about your issue because it does not have label/milestone or takes a long time to get fixed. That's normal.

Let's make things simple:

• You raise the issue and let it open => the issues has a chance to get fixed someday,
• You don't raise the issue or close it => it will never be fixed.

[KoBeWi]

Still valid in 3.2.3
Works fine on master with Vulkan renderer (although might be again a problem if GLES2 is reintroduced for 2D).