Decorative painting, crafting, furniture re-use/refurbishing
These are very interesting. A few I've come across before while some others I have not. Illusion is a powerful tool used by artists of all types to alter what viewers perceive. While these were takes on contrast as it pertains to perception, other more common illusions involve working with perspectives as would an architect, a muralist, or designer would do; making two dimensional objects appear three dimension using highlights, lines and shadows. Wonderful stuff.