Abstract: A computer-controlled additive manufacturing apparatus for fabricating an object. The apparatus includes a deposition head for selectively expelling first material therefrom, a reservoir containing a fluid-like second material, and a controller. At least one of the deposition head and at least a portion of the reservoir are movable, and the controller is configured to move at least one of the deposition head and the at least a portion of the reservoir relative to each other, and selectively operate the deposition head to expel the first material therefrom, responsive to computer instructions, thereby progressively depositing the first material in specific locations to fabricate the object having at least a portion thereof submerged in the second material.