no it's ok Well, all I know is that when you have a rendered picture it's all clean (the background is gone)It (normally) has to be a png file so that you can past in anywhere you want. For ex.: Make your own background/wallpaper: you can place the finished render on it. BUT that's the explanation for the word -render- in relation to images and pictures. There are also other meanings. Like,rendering a video...But that is smth else again.