He died of natural causes at the age of 95 at his daughter 's home in Graeagle , California , USA .
He was the father of Douglas Trumbull , with whom he worked on several of these film projects .
father died of natural causes at the age of 95 at father 's daughter 's home in Graeagle , California , USA .
He was the father of Douglas Trumbull , with whom he worked on several of these film projects .