depends what kind of camera. yu get some that are just rectangles, so a rectangle cake will do the job. or if its a proper camera, a bit more thought and carving might be needed.
can you do small roses? might want to attempt them before supersizing. it just comes down to (depending which way you do it) the size of your petal cutters/ balls.
xx
it can be tricky to make them bigger, maybe you just need to add more petals? do your center differently?
i think if you look on you tube you would see something, im sure i remember someone talking about giant roses on there.
xx
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