folding is a very easy technique using folded strips of paper cut from the inside of envelopes to fill a cut shape using holographic paper in the centre creates the 'iris'...hence the name.
I have also used patterned paper bags and wrapping paper to create different effects.
The square and circle are my first attempts at Iris folding using envelopes.
and Lantern patterns were taken from
Books and templates can be ordered from http://www.cardinspirations.co.uk
Link to Iris folding lessons: http://www.thewinniefactor.com