Ralf left the band shortly afterwards following the birth of his son Julian Wadephul. The 2006 Tangerine Dream release "Blue Dawn" consists of material composed by Froese and Wadephul during that same tour in 1988, albeit of a studio nature.
Following the birth of his son, Julian Wadephul, Ralf left the band.  The 2006 Tangerine Dream album "Blue Dawn" features music composed by both Froese and Wadephul during a tour in 1988.