Look at the website of Anim8tor to find all the information you need. E.g.:
Create 3D scenes and animations and output .AVI movie files, .JPG and .BMP images,
You can use .jpg and .bmp in Adventure Maker and also video files.
http://www.anim8or.com/main/index.html
If it's worth for you to learn it depends on what kind of games you want to make. I think that games that are made with 3D software look phantastic. But you can also use 2D pictures that look great. I think it's up to you to decide if you are willing to put in time to learn it or if you want to use other methods (photos, 2D pictures etc.).