Thanks! I was not sure my animation would work out the first time, so that’s why I wanted to use an expression, linking all of the spheres togeather. So that when I need to change something, I only need to animate the slider control again. Kevins tip worked for me, and I managed to make a really smooth tilting and zooming animation while the whole Earth rotates to the place I want. By the way, I used this method to set up all the rotation controls aswell.