message: Faded scenes in and out more gradually
diff: @@ -9,7 +9,7 @@ export default ({stateNavigator}) => (
  startStateKey="grid"
  unmountedStyle={{opacity: spring(0)}}
  mountedStyle={{opacity: spring(1)}}
  - crumbStyle={{opacity: spring(0)}}
  + crumbStyle={{opacity: spring(.9)}}
  style={{flex: 1}}
  stateNavigator={stateNavigator}>
  {({opacity}, scene, url) => (
  @@ -21,7 +21,7 @@ export default ({stateNavigator}) => (
  top: 0,
  bottom: 0,
  }}>
  - <View style={{opacity: opacity, flex: 1}}>
  + <View style={{opacity: opacity === 1 ? opacity : opacity / 2, flex: 1}}>
  {scene}
  </View>
  <ZoomMotion stateNavigator={stateNavigator} />
  