PLEASE NOTE: this tutorial is old, i cannot be sure how much even still works with the latest versions of all the programs listed. http://www.instructables.com/id/Sketchup-3D-modelling-file-conversion-and-advice-/ provides information on 3d modelling and animation with other packages which results in far more advanced video output. That newer tutorial is more likely to be helpful to you than this old one
In this instructable i will show you how to use google sketchup 3d modelling software and wax 2.0 video editing software to add spacecraft and explosions into videos and also how to use wax 2.0 for greenscreen effects. for a glimpse of the effects that can be achieved see the image.
download wax at http://www.debugmode.com/wax/
Step 1: Models
or across the internet searching for what you want followed by the word "mesh" example: starship mesh , space fighter mesh .these meshes will be of a variety of formats but wax 2.0 can only take those in "3DS, Quake MD2 & MilkShape MS3d" . so when you have a model you like you must convert it.
IMPORTANT: when making a film/animation one of the first things people will see is your models, a bad or boring mesh/model will ruin a video.
Now we must convert the models to .3ds .