This morph effect?

hey

Just found this, not quite sure how its done thouh

http://www.diamondgeezer.com/simpleselector/trilogy.html

moving the scroller accross the rings morph really well. Is it a simple alpha transition, but because the ring shapes are so alike, it just gives the impression its morphing?

Also, I can only image the ring images are nice transparent png’s?

What do you think?

Mark


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