Maybe he can correct me if im wrong here, but Ive seen this somewhat discussed in other threads (ive been asking the same questions), it will be possible in acrylic, less so in wood. To further clarify his answer, he stated in another thread that it would be a much smoother curve in homogenous materials(like acrylic), than in something where the density and consistency changes throughout the material (wood). He put up an early sample of a beveled cut here:
You can surmise that because this is a laser, and makes no physical contact with the material it is cutting, that getting accurate 3d portrayal of a design is going to vary on a case by case basis. If you are looking to get a consistent 3d cut through multiple materials you might want to pick u something that cuts physically, like a cnc router/mill. (or have both like I do! gives you everything you need!)