`z_index` bug in nodes2D

felipefacundes commented 2 weeks ago

Tested versions

4.3.stable

System information

Linux

Issue description

Initially, I noticed the z_index bug in Parallax 2D, I had to leave them all at the default 0, but I identified that the bug extended to other 2D nodes.

Steps to reproduce

All of the above

Minimal reproduction project (MRP)

All of the above

AThousandShips commented 2 weeks ago

Please explain the actual bug

felipefacundes commented 2 weeks ago

Explaining this bug in more detail:

Initially, I noticed a z-index bug in Parallax 2D, where the children of each Parallax were out of order—some appeared behind others, even though the hierarchy was correct. Additionally, some items were changing their order even though they belonged to the same node. I had to reset the z-index to the default value of 0 for the behavior to be as expected. While the z-index issue in Parallax2D was resolved by resetting the z-index to 0, I discovered that this bug also affects other 2D nodes. In my scene, for example, some items disappeared—one instance of a moving platform was visible, while another with the same configuration was hidden, even though all child nodes had z-index = 0. I performed several exhaustive tests on the node hierarchy, and the hierarchy is correct. The z-index bug is evident in this new version, 4.3.stable.

AThousandShips commented 2 weeks ago

Please break it down into clear instructions and add an MRP to make testing this easier:

A small Godot project which reproduces the issue, with no unnecessary files included. Be sure to not include the .godot folder in the archive (but keep project.godot).
Having an MRP is very important for contributors to be able to reproduce the bug in the same way that you are experiencing it. When testing a potential fix for the issue, contributors will use the MRP to validate that the fix is working as intended.
Drag and drop a ZIP archive to upload it (max 10 MB). Do not select another field until the project is done uploading.
Note for C# users: If your issue is not C#-specific, please upload a minimal reproduction project written in GDScript. This will make it easier for contributors to reproduce the issue locally as not everyone has a .NET setup available.

godotengine / godot