Hey there,
If I understand what you’re trying to do, there’s a few different ways of doing this.
1) Simply composite flat text on a separate layer over the top of the footage. It will look like that’s what you’ve done. Not really IN the scene.
2) Give the text some depth to give the illusion it exists in the scene. I would use Zaxwerks Invigorator to create 3D text, but you can cheat a little and use the shatter effect. Simply don’t shatter the text and you will be able to give it depth and even some subtle lighting effects. The lighting on the text should match the lighting of the scene you are trying to compose it onto. Ie, direction of Sun etc. Of course, the angle/perspective should also match. You can adjust all of these, Invigorator will give you more control though. Fake some shadows by either duplicating the text, blur it, scale it to sort of match the scene, then choose an appropriate transfer mode (multiply etc).
3) Ditch AE and use a full 3D package to composite the text onto the scene creating proper flowing shadows over the scene etc etc. This can take ages to get right especially if the background scenery is moving….but when you get it, it looks top notch.
Another little trick is to use the camera shake (or fake some) and track the text onto the scene. By that I mean if you use the subtle shake of a camera as if it were handheld (or even paning etc) and the text moves together with the scene, it sells the whole illusion of the text being IN the scene even more so.
Give those a try and see if you get close.
Alex
http://www.lightdrop.com.au