Hi Abdelghani, You should be able to achieve that by setting the project's terrain: ``` p=QgsRasterDemTerrainProvider() p.setLayer(dem_layer) QgsProject.instance().elevationProperties().setTerrainProvider(p) ``` This should get your dem_layer as a terrain for any new 3d views. I don't think the API to change the 3d views' terrain is exposed to python yet.
Best Stefanos
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