I’m actually having some kind of a small problem I guess. Basically I want to have the possibility to have different thumbnail sizes. Im having 3 types of posts, the blog post, which has a small 274×9999 size. The Work post, which has a bigger 635×9999 size and the background post, which is a post type where I can upload backgrounds which people can download, but for previewing those backgrounds I want of course a thumbnail which will be 249×147 big.
As I was reading the wp-codex I come across a function called add_image_size() – so from the documentary I’ve been reading, I can, with theme support (post-thumbnails), create a bunch of image sizes, so what I did was the following: