|I've noticed a lot of photographs of either patterns, fabric, pattern envelopes - all visually "flat" items, post on PR. The one thing most of these have in common is that they are hard to "see"; this is due to the photographer (usually) placing the item/s on a table or floor, and then "fitting (framing)" the items in the shot, which results in distortion.
Here's a tip I learned while struggling to photograph my artwork - no matter how many times I used that darn level, the "picture" was crooked, and thus distorted.
Place your item/s (pattern evelopes, patterns, fabric, etc.) on the floor. Between the items and the floor use a contrasting color (e.g. white pattern envelopes - place black posterboard, about $.010/sheet, on the floor and arrange the patterns on top. The opposite is true - dark items, such as some fabrics, use white posterboard.).
Next you will need your camera and something to stand on ( a chair, stepstool, table - whatever, as long as you are at least 18-24 inches above the ground), and a brightly lit room - even using flash.
Stand up on your stepstool, chair, etc. and point your camera down, directly above, what you want to photograph (thus, make sure that your material to be photographed is as close as possible to what you will be standing on.
Take your picture. It might take 2-3 tries to get the hang of - but once you do, I think you will be very happy with the results.
Remember, safety first - if you feel dizzy, or are nervous about heights, have a friend help you.
This technique also works great for photographing quilts, fiberarts, etc. for entering competitions!