Vat-based additive manufacturing with dispensed material

A method of creating additive manufactured parts, the method comprising:

• providing a first composition in a vat, wherein the first composition is a liquid with a first viscosity;
• providing a second composition to be dispensed, the second composition having a second viscosity, wherein polymerization components for formation of a layer of a part to be created are separated from each other, and wherein at least one of the polymerization components is in the first composition or the second composition;
• placing a build platform in the vat, submerged under a top surface of the first composition;
• during formation of the layer of the part, dispensing the second composition on the top surface of the first composition, the second composition being selectively dispensed in a shape area according to a pattern area of the layer of the part to be created;
• and
• illuminating the top surface to expose the first composition and the second composition to light having a polymerization wavelength, thereby causing polymerization of at least one of the first composition or the second composition only in the shape area where the second composition was dispensed.