Terrain 5 import problem

[Anonymous]

I have downloaded Terrain 5 DTM data from Ordnance Survey as a dwg, but cannot work out how to convert this into 3D info within Archicad. When I import it into a worksheet I get the 2D image shown on the screenshot, but have no idea what to do next.
I saw one post where it suggested using the mesh tool, but the mesh tool is greyed out and not usable.

[Christophe Fortineau]

Cause dwg deals with a 2D import so the 3D informations (in your dwg) are not processed
You should try to import a xyz or a e57 file to import your ground

By this way :

[Anonymous]

Thanks Christophe
In the UK Ordnance Survey map export, I have 3 download options.
ASC11 Grid (ASC)
3D TIN (DWG)..........the one I downloaded
3D PDF (PDF)
That's all. I could have downloaded a simple contour map, but I liked the idea of working with a series of spot levels.

[Christophe Fortineau]

There are some solutions here :
https://helpcenter.graphisoft.com/knowledgebase/25573/