I tried to change material color after I animated them. But everytime I change it outside animation, it changes back after I side the time line. Any idea how can I override material outside animation mode?
Indeed when properties of an entity are animated Bongo takes over control. Normally when you want to make a change outside animation you should get a dialog message.
Disabling the animation for the entity is the only way to (temporarily) overrule the animation settings.
Enable/dDisable animation for an entity can be done in the Bongo Properties window or via the context menu (right click) in the Animation Manager.