I'v tried to upload a render on click2host and a few other sites and even though the sites say they allow png files they won't let me upload them. They keep saying "can not upload this type of file". Iv checked my imgaes they are png but it just wont work.
There is your answer. Allthough the file might match the filesize, it is probably too big in size (px - px). I experienced this before, it's kind of stupid though, because none of the sites say they have restrictions. There are 2 ways to get it hosted though; 1. Buy an ftp-server (doesn't have to be too fancy, unless you want to host everything on it from then on). 2. Use a different filehost that doesn't allow hotlinking, upload the picture there (they mostly don't have a size limit), then make a thumbnail and host that on another imageshosting website that does allow hotlinking. Then create your own code; something like: Code: [url=http://linktooriginalsizedpicture][img]http://linktothumbnail[/img][/url]