ParallaxLayer does not respect z-index when motion_mirroring is set

[qaptoR]

Godot version

4.0 Stable and 4.0.1-rc2

System information

Windows 10, Forward+, Nvidia 3090 v 531.29

Issue description

When using motion_mirroring for a ParallaxLayer, the only draw ordering which the Texture2D respects is the tree order of Parralax Layers and CanvasLayers

Steps to reproduce

There are two scenes without_mirroring_A_over_B and with_mirroring_A_over_B. They are named as such because their z-index values should order them such that A is drawn over B.

You can reorder the tree-order of the two ParallaxLayers that contain SpriteA and SpriteB. You will see that for without_mirroring... it has no affect on draw order, but it does have an affect on with_mirroring....

Additionally, you can reorder SpriteD which shows the same thing, that ParallaxLayer does not consider z-index whatsoever when motion_mirroring is used.

Minimal reproduction project

ParallaxLayerOrdering.zip

[JorgeO3]

This bug is also present in godot 3.5.3.stable.mono.

[belzecue]

Confirmed bug in 3.6RC1

Parallax layer with NO mirroring.

Parallax layer with X mirroring applied (no other changes).

The Godot sprite has a z-index of 1000 and therefore should be drawn above the parallax layers.

Moving the Godot sprite to bottom of tree puts it back on top.

Workaround is to simply manually duplicate and contiguously place the background sprite under the parallax layer instead of relying on motion_mirror, and leave motion_mirror at zero for all layers. Node z-order is then respected.

[markdibarry]

Working for both ParallaxLayer and Parallax2D in 4.3. We draw the repeats differently now, so it respects z-index and scene order.