To convert a bunch of miniatures and make them stand out a bit more on the tabletop, I obtained a set of five capes from Anvil Industry recently.
The image shows four out of five of these capes (one of them reversed so you can see the detail). Every one of them is unique. Although they have been designed with their own range of miniatures in mind, these parts are entirely interchangeable with regular 40k troops. Note in particular the gap at the top of the capes. They are exactly the right size to fit behind the back of the torso and sit snugly under the power pack of any regular space marine or chaos space marine.
My intent here is to use them with some 30k reconnaissance troops as I didn't wish to purchase Forge World's own sniper marines -- I'm going to go for a bit of a different look. More on that in posts to come!