FLAT 3D EMBROIDERY IS WHEN A 3D PUFF EMBROIDERY DESIGN IS STITCHED ONTO A FLAT GARMENT.
FLAT 2D EMBROIDERY IS 2-DIMENSIONAL FLAT STITCHING ON A FLAT GARMENT OF YOUR CHOICE (PICTURE PROVIDED)
HAT 3D EMBROIDERY AS THE NAME IMPLIES IS A 3D PUFF EMBROIDERY ON A HAT
HAT 2D EMBROIDERY AS THE NAME IMPLIES IS A 2D FLAT EMBROIDERY ON A HAT