Hi n00b here.
recently switched to episerver and was under the impression (from a demo) that episerver has the ability to render a number of images (3?) when a user uploads an image to the CMS. the idea being that which ever device the user is viewing the front end website that determines which images is served to the user.
is that available or is it an add-on.
If you have an image uploaded in EPiServer you would get the image url with the UrlHelper, Url.ContentUrl(ImageContentLink), append a "width" query parameter to the URL and add a "slimmage" CSS class to the image tag.
I know ImageVault has the ability to create multiple formats when uploading too if you need a more powerful DAM