I'm hosting all my images and videos on Amazon S3 to speed up the site's loading times. Therefore I'm using the External Media function (under Add Image in Wordpress) when inserting Thumbnail images for my portfolio entries.
I understand that an image first has to be uploaded to the website's server before it will create a thumbnail image automatically. So for the portfolio pages I've manually created the correct thumbnail size images so that they display correctly.
But now I have a problem with the slideshow's thumbnail images which is right underneath the homepage slideshow. Is there a way to create those thumbnails manually? The slideshow images are 940x440 and hosted on Amazon S3. Now the thumbnails underneath the slideshow doesn't look that great because it directly uses the 940x440 image instead of an automatically created thumbnail which is in proportion.
You can take a look at http://www.universityofmakeup.com/ to see the distorted thumbnails underneath the slideshow.
I appreciate your advice.