You confused me.
So please help me understand if I miss something based on below notes:
HOW IT WORKS:
The featured image for the properties you use in theme slider must be as wide as the scree is. If you look at a screen 1920 px wide, your featured image must be 1920 px wide as well.
The demo with the envato bar + the plugin for colors is just for demo. The screenshots you send me from there are not the same since these extra elements are just for demo and influence results. So please, show me examples from a different URL.
My test URL for you is this http://samplea.wpresidence.net/
Theme Slider is here – http://samplea.wpresidence.net/homepage-v2/
Featured Image size for the property in slider is 1920 px wide
My screen looks like this http://i.imgur.com/MXvZ1dW.jpg
Send me a screenshot with the same URL from your screen. And tell me what screen it is.