A recent update has dramatically altered the appearance of the Featherfine shader from the Ash & Iron Rewards Pass. Where once it resembled the colors and materials from the ornaments and vehicles from the same pass, now it's just brown. I really liked that shader and this change seems obviously unintentional; hopefully it gets fixed soon. Here's another screenshot of the new look for Featherfine: https://imgur.com/a/57f1McD