1. I use Photoshop, using the pen tool I draw around the object that I want to use in Invigorator.
2. I use File Export paths to Illustrator to save the path.
3. I crop the picture to the same dimensions as the path and save it in Targa format (TGA)
4. In Invigorator import the Illustrator path, your puc should appear.
5. Under materials, material set up you can select the picture to overlay the shape if you want.
Hope this helps, I think that I found this advice somewhere in this forum. not sure if this can be done in Illustrator.