Project Moonspike is proposing to build a lunar rocket with complete transparency. You can find the tech report here (PDF warning) http://moonspike.com/wp-content/uploads/2015/09/MS_feasibilityStudy_Oct01_2015.pdf The rocket can be downloaded for viewing here http://moonspike.com/wp-content/uploads/2015/10/MS_Rocket3d_Oct2015.zip (using eViewer which is free) Would be interesting to know if it works in Kerbal. Any one up for a challenge? KvonB