Transform any room or walkway using these replica (PVC) Victorian ceiling tiles. They are easily cut with standard scissors and they stick to the wall nicely with coving adhesive. Purchase them on Amazon at a cost of £80 for a pack of 10.
TOH Pro Tip: "For a pleasing layout, and to avoid awkward cuts at the ends, always work from the center of the ceiling out. Snap two chalk lines: one that bisects the ceiling's length and one that bisects its width. Use the point where the lines intersect as your starting spot." —Tom Silva, TOH general contractor