Okey, before I begin I want to say sorry for having such a big file, the problem with the balloons creating these black-effects on themselves started when I changed the resolution of the output picture settings. I changed back and now they are stuck there. I have no idea what that is causing it. So my question to you is, do any of you blenderusers know this kind of problem such as have encountered it before? if so, how did you solve it? Anyhow, some facts about the file: there is a hole in the road, in that hole there is a plane creating tons of balloons, the balloons do not have mirror effects on but they do have raytrace on in tranparancy, there is an ambitient light on in the world settings, the balloons do not have any texture, they are individual meshes with their names balloon1 through balloon12. I do know that some of the balloons are going through the ground on the way up so no need to give me mega critizism straight on
Thanks in advance.