Model this feature in the same manner as the book, countersinking the main frame as a purchase for the smaller details. THis cannot be a success unless tackled with a
little vigour. It is a tricky detail which needs to be right first time. The receding planes of themain structure should becut firmly and of level depth, and held together with sharp supporting lines. Any surface
decoration should just be suggested, or hinted at, rather than be struggled with. The matte harp strings, cut firm against the slightly poshed background, should give a fair feeling of depth.
How this illusion comes about is not easy to explain. At its simplest level, an isolated printy or lens will be seen both as convex or concave. But
once the lens is related, for example, to the outh of a fish, it cannot be perceived in any other way but a sperical bubble.
This, once the mind is given a clue to reality, it wil perceive the object in terms of past experience, even against common sense.
624 Results June 15 2005
