[qt/qt/qtquick3d]: Summary of bulk changes made

Git repository change summary for qt/qt/qtquick3d
Pushed by mirror-service into branch '6.11.2'.
Changed from 2bea9159b38c8c0ad48a024f9ab3944c14af4672 to 3965cbd27bb3ced149c678d987358e17df8d8eb4
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit 3965cbd27bb3ced149c678d987358e17df8d8eb4 by Christian Strømme on 06/08/2026 at 04:03..
Fix layers support for particles

The particle system creates hidden internal nodes that do not take
part in the normal processing, meaning the particle system needs to
maintain and update the layers for the nodes it creates itself. This
was unfortunately missed in the initial implementation.
Note that this only applies to the internally created nodes, like the
sprite and line particles. For content  the instantiated from a
user-provided delegate (ModelParticle3D and ModelBlendParticle3D) the
layers property is left alone, since the layers property is not inherited
and stamping user content would override explicit layer assignments
made in the delegate. While this design causes a slightly different
behavior for the two types of particles, it follows intended behavior
of the layers API and also avoids that we try to be cleaver and guess
what the user actually wants to do.

Added particle effects to the layers example, including a model
particle with a compound delegate where each model assigns its own
content layer, and a visual test.

Change-Id: I0b2b08dfe6e19b7cbf4fcde81e485f1c360ef99b
Reviewed-by: Tomi Korpipää <[email protected]>
(cherry picked from commit d8f207d32a2c87b15be15548129eb25c5b205002)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>
(cherry picked from commit 0c44de171871cb5c26944eecdad5664868b3d498)
(cherry picked from commit 516b544b581eff6930d361af4871c9bba13703ef)
Reviewed-by: Christian Strømme <[email protected]>
https://invent.kde.org/qt/qt/qtquick3d/-/commit/3965cbd27bb3ced149c678d987358e17df8d8eb4