Bug report #18620
Layer rendering order broken in QGIS 3x
|Affected QGIS version:||3.1(master)||Regression?:||Yes|
|Operating System:||Easy fix?:||Yes|
|Pull Request or Patch supplied:||Yes||Resolution:||fixed/implemented|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||26508|
The alternative layer order (see separate "Layer Order Panel") is broken in QGIS 3 when opening a 2.18 project file.
This is not such a well-known, but very powerful feature - one can deliberately reorganize the rendering order in the separate "Layer Order" panel. This is necessary for more complex cartographic output (e.g. cadastral maps).
I noticed that an existing 2.18 qgs project opened in 3.0 does two bad things:
1. the checkbox "Control rendering order" in the "Layer Order" panel is set to "off" in QGIS 3, whereas it was on in 2.18
2. the ordering in the Layer Order panel is completeley mixed up (not as it was in 2.18).
I think that this a very important issue to fix for any serious cartographic output involving many layers.
I can provide sample data and project.
[bugfix] Layer rendering order broken in QGIS 3x
Cherry-picked from master 958cb3dd15d2