Hi,

We have been discussing with KDAB about the future maintenance of Qt 3D module. 
It is a quite large and complex module, which has for most use cases by now 
been superseded by Qt Quick 3D. Since Qt 3D has been available for a long time, 
it should continue to be available for those who still need it. It is also part 
of all currently supported releases, which would continue to have it in 
upcoming patch level releases.

After discussing with KDAB (maintainer of Qt 3D) on how to proceed, we came up 
with the following and also agreed that I’ll summarize it for the Qt project 
development list:

  *   Qt 3D module is removed from official release configuration in the dev 
branch, i.e. no longer part of the releases from Qt 6.8 onwards
  *   Qt 3D continues to be part of Qt project, it continues to be covered by 
CI, and available in the repository for those who want to use it
  *   Even though not part of the release configuration, intention is to keep 
Qt 3D working also with Qt 6.8
  *   Qt 6.7 and older releases continue to have Qt 3D module in the upcoming 
patch releases
Qt 3D module was initially developed for Qt 4 and then received a major 
overhaul for Qt 5. It was also brought forward to Qt 6. Initially the idea was 
to offer Qt 3D as a separate item in Qt 6.0 via package manage 
(https://wiki.qt.io/Qt_6.0.0_Modules), but since we were not able to make this 
modularity successful, it was included to the release configuration along with 
the other add-on modules. Qt Quick 3D is a later addition to Qt, originating 
from the contribution from NVIDIA 
(https://www.qt.io/blog/2017/02/20/introducing-qt-3d-studio), initially as a 
separate runtime, then refactored into Qt Quick 3D for Qt 5 to achieve better 
alignment with Qt Quick 2D and after that completely reworked to be fully 
aligned with Qt Quick in Qt 6.

Yours,

                Tuukka




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