it's me again :) i'm trying libgdx game completion. however, have been stuck transitions of 2 screens, want e.g. fade out menu screen when start game , fade in game screen. not use scene2d , not know me stages , actors. glad if me , solve problem. thanks in advance! :) don't worry, can achieve aim without using scene2d . anyway, there's more work build building block system it's worth @ end. concept the concept have game screen manager manage game screen(s) operating in game. that's being said. when transition 1 screen another, need such game screen manager control game screen able draw , , able update . normally have such manager manage game screen anyway. can further make use of achieve screen transition effect. such ability control play major role when transition effect kicks in. fading in/out effect, let's define t total time complete when 1 screen transitions another, a starting screen, b target screen, , m game scree...