[QGIS-Developer] Exact specification of the 3D Tiles support in QGIS?

[Johannes Kröger (WhereGroup)]

Howdy!

I am struggling with 3D Tiles in QGIS and wonder if someone could 
provide information as to which kinds of 3D Tiles exactly are supported.

For example:

  * 1.0? 1.1? Both?
  * Explicit or implicit tiling? Both?
  * EPSG:4979? EPSG:4978? Custom CRS?

I could get *none* of the 3D Tiles offered on 
https://3dtilesnederland.nl/3d-tilesets/ under "WGS 84" to show up in 
QGIS: 1.0 (b3dm) or 1.1 (glb), explicit or implicit tiling.

If you try different datasets from the "Amersfoort / RD New + NAP 
height" section there in the 1.0 Explicit column, some might work (e.g. 
Cesium ion Rotterdam Wilhelminakade – Textured or "FME (Safe Software) 
Rotterdam Stadsdriehoek LoD2"), others won't (e.g. "pg2b3dm Amsterdam 
BAG v20231008" shows up misaligned and with gaps in 3D; "VCS (Virtual 
City Systems) Rotterdam" or "pg2b3dm Rotterdam Ommoord" do not show up 
at all).

Are there specific tile generators that are ideal for creating (big) 3D 
Tiles datasets for QGIS?

Cheers, Hannes
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