While I don't have any pictures of a kilt pleated that way, one trick I've used is to find a quality image (one that shows the tartan very 'square' to the edges) of the tartan and PHOTOSHOP it. Copy / paste a TALL & THIN box surrounding the predominent stripe and paste, paste, paste. Line them up and you have an approximation of what it will look like pleated to the stripe.

I hope this helps!