hotglue, or glue of any kind.... NOT GOOD.
this is an "inside out" jacket. the fur is actually the seams that would normally be on the inside of a garment, the lines are where the fur is stitched together.
it's actually VERY easy to make. find a friend who has a good eye for design, get an old t-shirt you don't mind ruining, grab a roll of duct tape, and make a duct tape pattern of your torso.
once you're all taped up, get your friend to roughly draw the lines of the vest onto the duct tape while still on you, mark the pieces in some why so they can be reconstructed, then carefully cut the whole thing off.
chop the pieces out of the pattern, then on a decent piece of fur draw the shapes on, leaving a good 3 inches.
then it's a simple matter of sewing the whole thing together. do a running stitch about 1/2 an inch from the edge to hold the pieces together and simply either machine of backstitch. fur is VERY forgiving when you're sewing it, so you really shouldn't have any problems.
i'll try to put a photo of the inside of a fursuit up for you to see the effect later...
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