I've created an animation which has a black background (created a black solid), and then added new images on top of it.
The new images all had black backgrounds along with the actual object so using colourkey I removed the black of each images background so that the shape in the image only shows. (hope this all makes sense so far!)
now when i came to export the file to swf, i played it on a webpage and the black background mage does not show, its transparent, and the black background of each image which i removed with the colour key does show up!!
arghhhh please can someone help me asap!!!???
First, why are you exporting as SWF from After Effects? That is only useful if you need to preserve vectors, and there are very few things that are preserved as vectors when exporting to SWF from After Effects. If you need a SWF animation, it's almost always better to create it in Flash. If you want to export your animations from After Effects to play in Flash, it's almost always best to render and export to F4V or FLV. See this page for information about alternatives for creating material from After Effects for Flash or Flash Player: "Rendering and exporting for Flash Professional or Flash Player".
Very often, when someone complains of something not appearing in a SWF file exported from After Effects, it's because they selected Ignore for the Unsupported Features setting. See "Render and export a composition as a SWF file".
Please search this forum. I've answered similar questions twice last week. In short: Transparency handling is not automatic but needs to be properly handled with the embedding of the images or video on the HTML page or SWF and AE is less than ideal. You are trying to oversimplify a more complex matter.