Full screen slideshow in Altitude Pro using Backstretch. https://sridharkatakam.com/full-screen-slideshow-in-altitude-pro-using-backstretch/

front-page.php

<?php
/**
 * This file adds the Home Page to the Altitude Pro Theme.
 *
 * @author StudioPress
 * @package Altitude
 * @subpackage Customizations
 */

add_action( 'genesis_meta', 'altitude_front_page_genesis_meta' );
/**
 * Add widget support for homepage. If no widgets active, display the default loop.
 *
 */
function altitude_front_page_genesis_meta() {

	if ( is_active_sidebar( 'front-page-1' ) ) {

		// Enqueue scripts
		add_action( 'wp_enqueue_scripts', 'altitude_enqueue_altitude_script' );

		// Add front-page body class
		add_filter( 'body_class', 'altitude_body_class' );

		// Force full width content layout
		add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_full_width_content' );

		// Remove breadcrumbs
		remove_action( 'genesis_before_loop', 'genesis_do_breadcrumbs' );

		// Remove the default Genesis loop
		remove_action( 'genesis_loop', 'genesis_do_loop' );

		// Add homepage widgets
		add_action( 'genesis_loop', 'altitude_front_page_widgets' );

	}

}

function altitude_enqueue_altitude_script() {

		wp_enqueue_script( 'backstretch', get_bloginfo( 'stylesheet_directory' ) . '/js/jquery.backstretch.min.js', array( 'jquery' ), '', true );

		wp_enqueue_script( 'altitude-script', get_bloginfo( 'stylesheet_directory' ) . '/js/home.js', array( 'backstretch' ), '1.0.0', true );
		wp_enqueue_script( 'localScroll', get_stylesheet_directory_uri() . '/js/jquery.localScroll.min.js', array( 'scrollTo' ), '1.2.8b', true );
		wp_enqueue_script( 'scrollTo', get_stylesheet_directory_uri() . '/js/jquery.scrollTo.min.js', array( 'jquery' ), '1.4.5-beta', true );

}

function altitude_body_class( $classes ) {

		$classes[] = 'front-page featured-section';
		return $classes;

}

// Add markup for front page widgets
function altitude_front_page_widgets() {

	genesis_widget_area( 'front-page-1', array(
		'before' => '<div id="front-page-1" class="front-page-1"><div class="image-section"><div class="flexible-widgets widget-area' . altitude_widget_area_class( 'front-page-1' ) . '"><div class="wrap">',
		'after'  => '</div></div></div></div>',
	) );

}

genesis();

gistfile1.js

// Create an array of images that you'd like to use
var images = [
	'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-3.jpg',
	'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-4.jpg',
	'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-5.jpg',
	'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-6.jpg'
];

$('body.home').backstretch(images, {
	fade: 1000,
	duration: 5000
});

$(window).one('backstretch.after', function () {
	$('.backstretch').after('<div class="linear-gradient"></div>');
	$('.linear-gradient').fadeIn(1000);
	$('.home .site-footer').fadeIn();
});

gistfile2.php

//* Add Image upload and Color select to WordPress Theme Customizer
// require_once( get_stylesheet_directory() . '/lib/customize.php' );

//* Include Customizer CSS
// include_once( get_stylesheet_directory() . '/lib/output.php' );

gistfile3.php

// genesis_register_sidebar( array(
// 	'id'          => 'front-page-2',
// 	'name'        => __( 'Front Page 2', 'altitude' ),
// 	'description' => __( 'This is the front page 2 section.', 'altitude' ),
// ) );
// genesis_register_sidebar( array(
// 	'id'          => 'front-page-3',
// 	'name'        => __( 'Front Page 3', 'altitude' ),
// 	'description' => __( 'This is the front page 3 section.', 'altitude' ),
// ) );
// genesis_register_sidebar( array(
// 	'id'          => 'front-page-4',
// 	'name'        => __( 'Front Page 4', 'altitude' ),
// 	'description' => __( 'This is the front page 4 section.', 'altitude' ),
// ) );
// genesis_register_sidebar( array(
// 	'id'          => 'front-page-5',
// 	'name'        => __( 'Front Page 5', 'altitude' ),
// 	'description' => __( 'This is the front page 5 section.', 'altitude' ),
// ) );
// genesis_register_sidebar( array(
// 	'id'          => 'front-page-6',
// 	'name'        => __( 'Front Page 6', 'altitude' ),
// 	'description' => __( 'This is the front page 6 section.', 'altitude' ),
// ) );
// genesis_register_sidebar( array(
// 	'id'          => 'front-page-7',
// 	'name'        => __( 'Front Page 7', 'altitude' ),
// 	'description' => __( 'This is the front page 7 section.', 'altitude' ),
// ) );

home.js

jQuery(function( $ ){

	// Local Scroll Speed
	$.localScroll({
		duration: 750
	});

	// Image Section Height
	var windowHeight = $( window ).height();

	$( '.image-section' ) .css({'height': windowHeight +'px'});

	$( window ).resize(function(){

		var windowHeight = $( window ).height();

		$( '.image-section' ) .css({'height': windowHeight +'px'});

	});

	// Create an array of images that you'd like to use
	var images = [
		'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-3.jpg',
		'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-4.jpg',
		'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-5.jpg',
		'http://rebecca2.beyostudio.com/wp-content/themes/rebeccathompson/images/backstretch-6.jpg'
	];

	$('body.home').backstretch(images, {
		fade: 1000,
		duration: 5000
	});

	$(window).one('backstretch.after', function () {
		$('.backstretch').after('<div class="linear-gradient"></div>');
		$('.linear-gradient').fadeIn(1000);
		$('.home .site-footer').fadeIn();
	});

});

style.css

/* Front page Backstrecth slideshow with gradient
------------------------------------------------ */

.home .site-inner,
.home .front-page-1 {
	background: transparent;
}

.home .image-section {
	background: transparent;
	filter: none;
}

.linear-gradient {
	display: none;
	position: absolute;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	background: -moz-linear-gradient(top,  rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.5) 30%, rgba(0,0,0,0.8) 80%, rgba(0,0,0,0.9) 100%);
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(0,0,0,0.2)), color-stop(30%,rgba(0,0,0,0.5)), color-stop(80%,rgba(0,0,0,0.8)), color-stop(100%,rgba(0,0,0,0.9)));
	background: -webkit-linear-gradient(top,  rgba(0,0,0,0.2) 0%,rgba(0,0,0,0.5) 30%,rgba(0,0,0,0.8) 80%,rgba(0,0,0,0.9) 100%);
	background: -o-linear-gradient(top,  rgba(0,0,0,0.2) 0%,rgba(0,0,0,0.5) 30%,rgba(0,0,0,0.8) 80%,rgba(0,0,0,0.9) 100%);
	background: -ms-linear-gradient(top,  rgba(0,0,0,0.2) 0%,rgba(0,0,0,0.5) 30%,rgba(0,0,0,0.8) 80%,rgba(0,0,0,0.9) 100%);
	background: linear-gradient(to bottom,  rgba(0,0,0,0.2) 0%,rgba(0,0,0,0.5) 30%,rgba(0,0,0,0.8) 80%,rgba(0,0,0,0.9) 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#33000000', endColorstr='#e6000000',GradientType=0 );
}

.home .site-footer {
	display: none;
}