[3D] Add support for a 2d map overlay (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#62845
Author: @ptitjano
QGIS version: 4.0

**[3D] Add support for a 2d map overlay **

PR Description:

Description

This adds a new feature to the 3d map view to display an overlay of the 2d map centered around the position of the 3d camera. This allows in particular to better understand the current location of the 3d scene or to get an overview of the 2D canvas when only the 3d map view is visible.

with camera frustum activated:

Demo

qgis_3d_map_overlay.mp4

Update 22 january

• Added a timer to prevent too many updates
• camera frustum is now visible when the option is enabled

Commits tagged with [need-docs] or [FEATURE]