I'm trying to replicate the chequered boxes on the following image (sorry for really low-res)
Notice how the squares distort / warp with the shape of the path.
I can create the chequered boxes easily as a pattern in Illustrator... I then pasted them into Photoshop and tried the Warp tool (but this really didn't go very well).
Perhaps it is a better idea to create some form of Brush in Illustrator instead?