[Qgis-user] Assistance Required for Creating Watertight 3D Map Geometry Using QGIS

[Raymond Nijssen]

Hi Toby,

Recently, I've been working on exporter algorithms to get my QGIS layers 
into Blender3D. The first release is in the plugin repo, marked as 
experimental. Maybe you can use it?

https://plugins.qgis.org/plugins/io_3d_plugin/


Currently I'm working on a polygons to .obj exporter:

https://gitlab.com/terglobo/qgis_io_3d_plugin

Kind regards,
Raymond


On 3/4/25 06:10, Tobias Schula via QGIS-User wrote:
> On Tuesday, 4 March 2025, 05:41:04 CET Harnish Patel via QGIS-User wrote:
>> I hope this message finds you well. I am currently working on an airflow
>> simulation project using Ansys Fluent, where I aim to simulate airflow
>> dynamics through an urban city area. To proceed with the simulation, I
>> require a 3D watertight geometry of the city to input into the simulation
>> software.
> 
> You can create a mesh from DEM data and buildings in QGIS, but the exported
> mesh will hardly be watertight. I suggest you export it to a 3D modeling
> software like blender.
> 
> You can use the plugin "Qgis2threejs", it will export into glTF which you can
> import in blender:
>> https://plugins.qgis.org/plugins/Qgis2threejs/#plugin-details
> 
> Also read the documentation:
>> https://minorua.github.io/Qgis2threejs/docs/
> 
> Then consult the blender documentation and community for making your mesh
> watertight. Unfortunately, my knowledge of Blender is constricted to modeling
> for 3D games and that was 15 years ago.
> 
> Best regards
> Toby