Before we begin, let's get some image to model. In Photoshop, align them.
So here it is:
Use marquee tool to select each image, crop, and then save them separately. So, now we have:
car_side.jpg
car_top.jpg
car_front.jpg
Notice that the car_front is facing right, we need to rotate it 90* to the left, so it's facing down (which is +Z in Maya)
Back in maya, here is the first technique:
01. Using camera image plane.
advantage: Easy, less hassle.
disadvantage: Slow down maya performance.
How? Watch this video :)
02. Using poly plane.
advantage: Faster maya performance, easy adjustment.
disadvantage: Slow setup.
How? Watch this video :)
From both technique, I prefer to use the second one, which use polyPlane. I know it takes a while to setup, but hey.. There's a script to simplify your workflow.
Watch this video to understand better :)