Changelog for QGIS 4.2
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* Breaking Changes : Move QGIS4 settings storage location with automated migration from QGIS3

* User Interface : Add layer menu to load and save styles

* Symbology : Add categorized renderer for 3D Symbols

* Symbology : Add physically based material with texture support

* Symbology : Add trim distance start and end to Hashes/Markers line symbol layer

* Symbology : Add data-defined control for metal rough base, emission color

* Symbology : Data defined control over phong/metal rough texture scale, rotation and offset

* Symbology : Add optional solid emission color to metal rough material

* Symbology : Add opacity support to metal rough materials

* Symbology : Add 3d material settings to style database

* Symbology : Allow choice of up/forward axis for 3d point model symbols

* Symbology : Add extra items for templated line symbol layer

* 3D Features : Generate environmental lighting from skybox

* 3D Features : Support 3D model instancing

* 3D Features : Allow control over 3d map color grading effects

* 3D Features : Optional light bloom effects

* 3D Features : Add multisample anti aliasing (MSAA)

* 3D Features : Add gradient background to 3D scene

* 3D Features : 3D Tiles: add instancing support

* 3D Features : Add implicit tiling for 3D Tiles

* 3D Features : Add camera controls dialog to control the 3D camera in map coordinates

* 3D Features : Add support for 3D composite tiles ("cmpt")

* 3D Features : Improve 3D map view "Invert vertical axis" setting.

* 3D Features : 3d export stl

* Point Clouds : Add overview-length optional parameter to build vpc algorithm

* Point Clouds : Add reading support for multi-overview VPC files

* Point Clouds : Add support for a vpc-in-zip (.vpz) virtual point cloud format

* Point Clouds : Add per layer elevation shading

* Point Clouds : Support arithmetic operators on color objects in expressions

* Point Clouds : Modify renderer color by expression

* Print Layouts : Add new layout chart item functionality to derive plot data and styling from the source vector layer renderer

* Print Layouts : Add new option to clip a picture item by a shape-based item

* Print Layouts : Geospatial PDF layer management enhancement

* Expressions : Add scale_cubic_bezier expression function, handle bezier-cubic interpolation when converting MapBox styles

* Expressions : Add concat_ws expression function

* Data Management : Adding "Field Calculator" menu item to the attribute table header

* Processing : Dynamically show child step feature counts as model progresses

* Processing : Add an area threshold parameter

* Processing : Add support for the SFCGAL extend to edges parameter in medial axis algorithm

* Processing : Add processing in user defined menu or toolbar

* Processing : Random subset algorithms ported to C++

* Application and Project Options : Topocentric projection

* Sensors : Add support for SensorThings 2.0, including Sensing, Sampling and Relations extensions

* Profile Plots : Display elevation profile curve in 3D

* Browser : Rework how ESRI REST services are exposed in the browser

* Data Providers : Greatly speed up the FeatureServer provider for map viewing

* Data Providers : Enable parallel provider load for AFS, AMS providers, and some related fixes

* Data Providers : Support STAC assets from other cloud optimized data types and blob stores

* QGIS Server : Add support for HIGHLIGHT_LABELFRAME options WMS params

* QGIS Server : FlatGeobuf OAPIF export plus various fixes

* Programmability : Expose concave hull of polygons functionality

* Notable Fixes : Bug fixes by Even Rouault (Spatialys)

* Notable Fixes : Bug fixes by Denis Rouzaud (OPENGIS.ch)

* Notable Fixes : Bug fixes by Alessandro Pasotti (QCooperative)

* Notable Fixes : Bug fixes by Julien Cabieces (Oslandia)

* Notable Fixes : Bug fixes by Germán Carrillo (OPENGIS.ch)

* Notable Fixes : Bug fixes by David Signer (OPENGIS.ch)

* Notable Fixes : Bug fixes by Stefanos Natsis (Lutra Consulting)

* Notable Fixes : Bug fixes by Loïc Bartoletti (Oslandia)