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While 3D Photography is ideal, an overwhelming majority of lenticular is converted to deep 3D from 2D images. How do we do this? Well, there are a variety of ways. One that I'll discuss here is using displacement maps in Photoshop. The way that it works is that values of brightness are used to push or pull pixels in negative or positive directions. This is how we create positive and negative depth on what ordinarily would be a "flat" image. It's obvious that we can't ask Mona Lisa to sit for a 3D shoot, so displacement maps were our only solution: 
Darker areas are negative dimension, lighter is positive. For example, her nose is more "positive" than her face, her back arm is more "negative" than her hands. The far background was left on it's own layer, and since it's offset in space we had to clone in (ie. recreate) some of what is behind her*. *Advanced Technique; contact us to speak with a designer. The result is a dynamic 3D Lenticular: 
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