Displaying custom images linked to sites

Thank you for your reply!

Unfortunately I didn’t even manage to get the custom thumbnails being displayed—not even cracked images.

Here’s my shortcode:
[nlposts thumbnail_custom=true thumbnail_field=custom_thumb_field]

And I created a custom field called custom_thumb_field in my latest post where I inserted an URL to an image.

Where did I go wrong?

Is it possible to add an image from an options page—not from a custom field of a post? I don’t know if it helps but the value of that field can be outputted by:

<?php
    $options = get_option('element'); // Get options of the theme called 'element'
    $color = $options['16']; // ID of the input field
    echo '$color'; // Output the value
?>

Ah, with the thumbnail=true it works, thank you!

The code is generated by the NHP Options Framework—here’s the relevant code (shortened):

function setup_framework_options(){

	$args = array();

	//Set it to dev mode to view the class settings/info in the form - default is false
	$args['dev_mode'] = false;

	//Choose a custom option name for your theme options, the default is the theme name in lowercase with spaces replaced by underscores
	$args['opt_name'] = 'element';

	//Custom page slug for options page (wp-admin/themes.php?page=***) - default is "nhp_theme_options"
	$args['page_slug'] = 'nhp_theme_options';

	//Custom page capability - default is set to "manage_options"
	//$args['page_cap'] = 'manage_options';

	//page type - "menu" (adds a top menu section) or "submenu" (adds a submenu) - default is set to "menu"
	//$args['page_type'] = 'submenu';

	//parent menu - default is set to "themes.php" (Appearance)
	//the list of available parent menus is available here: http://codex.wordpress.org/Function_Reference/add_submenu_page#Parameters
	//$args['page_parent'] = 'themes.php';

	$sections = array();

	$sections[] = array(
					'icon' => NHP_OPTIONS_URL.'img/glyphicons/glyphicons_107_text_resize.png',
					'title' => __('Text Fields', 'nhp-opts'),
					'desc' => __('<p class="description">This is the Description. Again HTML is allowed2</p>', 'nhp-opts'),
					'fields' => array(
						array(
							'id' => '1', //must be unique
							'type' => 'text', //builtin fields include: text|textarea|editor|checkbox|multi_checkbox|radio|radio_img|button_set|select|multi_select|color|date|divide|info|upload
							'title' => __('Text Option', 'nhp-opts'),
							'sub_desc' => __('This is a little space under the Field Title in the Options table, additonal info is good in here.', 'nhp-opts')
							),
						array(
							'id' => 'logo',
							'type' => 'upload',
							'title' => __('Logo', 'nhp-opts'),
							'sub_desc' => __('No validation can be done on this field type', 'nhp-opts'),
							'desc' => __('Width should be 270px.', 'nhp-opts')
							)
						)
					);

	}

add_action('init', 'setup_framework_options', 0);

Thank you very much!