For best results, iron the fabric beforehand to remove creases. Otherwise, iron the fabric once cut to shape.
Lay the fabric out on a flat surface, backside facing up. Place the seam or edge of the lampshade at one edge of the fabric, leaving enough room above and below because the round lampshade pattern will curve.
Lightly trace the top and bottom of the lampshade as you roll it across the fabric and reach the edge again.
Cut out the pattern, leaving about 1 inch around your marks to allow for folded over seams. It should be a long, curved shape for a tapered lampshade.
Starting at the seam or edge of the lampshade, apply Mod Podge Gloss all over the shade with a paint brush. Press the fabric on top, smoothing it with your hands. Work in sections until the entire lampshade is covered with fabric.
Where the two ends of the fabric meet, fold one side over about a half inch and glue on top of the other edge to create a clean seam.
Fold over the remaining edges of fabric on the top and bottom of the lampshade and glue in place on the inside. If there are bars in the way (that attach the lampshade to the base), simply cut a small slit with scissors and fold the seams in around it. Allow to dry before using.