У вашего броузера проблема в совместимости с HTML5
This video illustrate how to model skyscraper by SketchUp
pulgins: Helix along curve / BZ-toolbar / Curviloft / Tools on Surface / Soap Bubble / Weld
links for Plugins :
http://extensions.sketchup.com/en/content/weld
https://extensions.sketchup.com/en/content/soap-skin-bubble
http://sketchucation.com/pluginstore?pln=ToolsOnSurface
http://sketchucation.com/pluginstore?pln=Curviloft
http://sketchucation.com/forums/viewtopic.php?f=323&t=51770