Use this parameter to change how this shape behaves when it intersects with others. It may carve out of the other shape; it may be carved into itself; it may union with the other shape; they may intersect. There are 45 options, really three consecutive groups of 15. They are not well documented at this time, so play among them and see what works. (Generally picking a shapeMode from a different range of 15 (1-15, 16-30, 31-45) will be most likely to yield different results.) Remember that you will never see the effect of shapeMode until this shape comes into contact with another shape. Until such time, it is a latent genetic property that will not find phenotypic expression.