Been doing sections from Sketchup for years. Layout seems to have the functionality I need (previously used to export high res. tif’s and edit the section line in photoshop).
The top image is a screen grab from Layout
The bottom image is a site section (small scale hence thick line) showing what we want to achieve, namely a tidy section without all the below ground stuff.
Hey Anssi. That is a revelation, thankyou. I didn’t spot this new feature in SU2018. Do you have any idea why the terrain model isn’t playing ball? It’s pretty big, the buildings (which are OK, I made the fill blue so you can see what’s working) are obviously much smaller, and I suppose can be classified as ‘closed’ where as the terrain model is very rambling and I suspect has gaps dotted around the place (I exploded all it’s constituent parts to see it would become a single closed entity, no luck).