Jean Felder

> Can you take a look at https://github.com/qgis/QGIS/pull/53323/files and adapt the definition of empty/null here to that PR? Otherwise we'll run into the same issue here where an empty box...

Update: fixed test `PyQgsOapifProvider`

@wonder-sk @uclaros Any thoughts?

> Honestly i don't think this is any cleaner then the current code. Eg I don't like the idea of a dummy layer -- either the terrain IS a layer...

> @ptitjano sorry I am a bit lost. What is the actual problem you are trying to solve in this PR? > > Is it that Qgs3DMapScene contains `mTerrain`, `mSceneEntities`...

> Thanks for looking into this issue - but indeed the correct solution would be what @uclaros suggests. > > QgsChunkedEntity at this point has no ties to terrain whatsoever,...

> * QgsTerrainEntity - stop using mTerrainTransform and leave it for individual chunk entities to set up correct transform I also don't understand why you want to remove `mTerrainTransform` and...

@wonder-sk gentle ping.

> @ptitjano any chance to see it merged before mid-April? I will work on it next week.

@AbdelghaniTamort Thanks for the report and the detailed information. Could you please share your data and your QGIS project?