In a large bucket, mix water and plaster together until you achieve a muddy texture. *TIP: If too watery, add more plaster mix. If too thick, add more water.
Unfold bed sheet & completely submerge sheet in mixture.
Stir sheet inside bucket to ensure it's evenly coated.
Lay 3 canvases side by side.
Drape bed sheet across canvases to create desired shape.
Cut any material of sheet that hangs off the canvases.
Let dry until firm and bedsheet is glued to canvases. *TIP: Cracking & crumbling of plaster mix is totally normal. You can use a spray adhesive to coat as well once dry to secure any loose sections.