Here are a few plugin's for sketchup you might like to try (we've not used them all, but some ARCH1101 Students are using them to create curving/intricate shapes):
1. Soap Skin and Bubble (Extension Warehouse ... under Window > Extension Warehouse > Search)
2. Bezier Curve Tool (Extension Warehouse)
3. 3d Trusses: A student in James Pedersen's group last year, Jason Yan, shared how he created the 3d trusses in his designs here: http://whatsupjasonyan.blogspot.com.au/2016/04/trusses-tutorial.html
You can get JHS Powerbar here, and s4u to Components at the Extension Warehouse.
Russell and Andrew