June 18, 2018, 10:46:22 pm
Lumion is not able to import 2D data, only 3D data.
You could create an image or screencapture of the 2D plan and import that as a texture (Color Map) to a surface to use as a base for layout. You would need to get the scales correct.
As you will probably need to be modelling context and buildings in your 3D modelling application, you are likely to use that masterplan anyway. So if you can convert the 2D dwg to an image/PDF for modelling against, and then have that laid out as needed in your model to a surface, you can then import that to Lumion.
What 3D modelling software are you using, and also which version of Lumion?