antoniodltm/iwg/master/sites/all/themes/visia/images/.htaccess
<IfModule mod_rewrite.c> Options -MultiViews RewriteEngine on RewriteCond %{HTTP_COOKIE} HTTP_IS_RETINA [NC] RewriteCond %{REQUEST_FILENAME} !@2x RewriteRule ^(.*).(gif|jpg|png)$ $1@2x.$2 # if @2x isn't available fulfill the original request RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)@2x.(gif|jpg|png)$ $1.$2 </IfModule>