Thank you for the ideas. As I unfortunetely suspected it seems it cannot be done using sketchup since it's a surface modeler. My hopes were that you could somehow use groups to define blocks and then turn them in to solids, i.e from consisting of faces and lines to homogenous blocks using for example a plugin. It shouldn't be to hard since the bounding box of the geometry gives the coordinates for the block but i'm not very good at programming so I will have to try something else. Thank you again for your help.

Best regards
Mattias

I'm just wondering if anyone knows of a plugin or other solution that could help me.
I have recently been using sketchup to model geometries for heat and smoke transfer calculations. In order to use the calculation software I have to export to .dxf from sketchup. The problem is that in order to perform heat transfer calculations through, for example walls, i would need the walls to be modeled as solid blocks. This would also significantly simplify the naming process of the different components in the geometry since the calculation software otherwise explodes groups and components into individual faces.

Is it possible to convert a block or other shape created in sketchup to a solid in any way and still end up with a dxf-file in the end? All help will be very appreciated!

Best regards
Mattias
Fire protection engineer