Systems and methods in accordance with embodiments of the invention fabricate objects using investment molding techniques. In one embodiment, a method of fabricating an object includes: fabricating a subassembly including a plurality of volumes； where each volume is defined by the homogenous presence or absence of a material； where fabricating the subassembly includes using an additive manufacturing process； where at least one of the plurality of volumes defines a shape that is to exist in the object to be fabricated； where at least a first of the plurality of volumes includes a first dissolvable material； dissolving the first dissolvable material； where the dissolution of the first dissolvable material does not dissolve at least one other material within the subassembly； forming at least one cavity within the subassembly； and introducing an additive material into the at least one cavity.
