On another thread, I was asking how to ease in or out the default launch screen. After getting a partial answer, I am still facing with an issue. The second Default.png file gets slightly re-sized (due to the statusbar I believe).

The code for the app.js is:

Titanium.UI.setBackgroundColor('#000');


// create tab group
var tabGroup = Titanium.UI.createTabGroup();


//
// create base UI tab and root window
//
var win1 = Titanium.UI.createWindow({  
    title:'Tab 1',
    backgroundColor:'#fff'
});
var tab1 = Titanium.UI.createTab({  
    icon:'KS_nav_views.png',
    title:'Tab 1',
    window:win1
});

var label1 = Titanium.UI.createLabel({
    color:'#999',
    text:'I am Window 1',
    font:{fontSize:20,fontFamily:'Helvetica Neue'},
    textAlign:'center',
    width:'auto'
});

win1.add(label1);

//
// create controls tab and root window
//
var win2 = Titanium.UI.createWindow({  
    title:'Tab 2',
    backgroundColor:'#fff'
});
var tab2 = Titanium.UI.createTab({  
    icon:'KS_nav_ui.png',
    title:'Tab 2',
    window:win2
});

var label2 = Titanium.UI.createLabel({
    color:'#999',
    text:'I am Window 2',
    font:{fontSize:20,fontFamily:'Helvetica Neue'},
    textAlign:'center',
    width:'auto'
});

win2.add(label2);



//
//  add tabs
//
tabGroup.addTab(tab1);  
tabGroup.addTab(tab2);  


tabGroup.setActiveTab(1);

// open tab group with a transition animation
tabGroup.opacity = 0;

var startupView =Titanium.UI.createImageView({url:'Default.png'});

var startupAnimation = Titanium.UI.createAnimation({
        curve:Ti.UI.ANIMATION_CURVE_EASE_IN,
        opacity:1,
        duration:2000
    });

var startupWindow = Titanium.UI.createWindow({ 
    backgroundColor:'#fff'
});

startupWindow.add(startupView);
startupWindow.open();

tabGroup.open(startupAnimation);