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Shape Keys are the specified positions of vertices within an Object; the actual points that define the mesh. Since this can involve thousands of vertices for an object, separate motion curves are not created for each vertex because it would overload your computer's memory.
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submitted: 5 years and 3694 days ago
The Blender API provides us with the means to define IPOs from scratch, enabling the definition of movements not easily re-created by setting key frames by hand. Thus there is more to IPOs than just driving one IPO by another one. Furthermore, Shape keys and poses are examples of (collections of) IPOs that are quite different from, for example, a location IPO. We will encounter both shape keys and poses later on in this article, but we will start off with looking at how we might define an IPO from scratch.
submitted: 5 years and 3413 days ago