A method of producing a 3D structure from incrementally linked subunits of an input material, without requiring a phase change of the input material to produce the 3D structure, the method comprising the steps of: providing a desired 3D structure; inserting an input material into a stitch additive manufacturing machine; arranging the input material into a plurality of interlinked subunits that resemble the desired 3D structure by: forming a subunit of the plurality of interlinked subunits by traversing the input material through at least one loop of at least one previously-formed subunit, thereby interlinking the formed subunit with the at least one previously-formed subunit; and selecting the at least one previously-formed subunit through which the formed subunit traverses, the selection made such that the interlinked formed subunit and at least one previously-formed subunit are disposed adjacent each other, such that a volume of the stitch additive manufactured 3D structure incrementally increases; producing a stitch additive manufactured 3D structure based on the provided desired 3D structure, the produced stitch additive manufactured 3D structure including the plurality of interlinked subunits; and manipulating the stitch additive manufactured 3D structure during the additive manufacturing process by: contacting at least a portion of the stitch additive manufactured 3D structure with a protruding end effector (1206, 1219, 1603, 1614, 2303) of the stitch additive manufacturing machine; and applying a directed force onto the portion of the stitch additive manufactured 3D structure by translating the protruding end effector in a direction, thereby at least partially translating the portion of the stitch additive manufactured 3D structure and manipulating the shape of the portion. providing a desired 3D structure; inserting an input material into a stitch additive manufacturing machine; arranging the input material into a plurality of interlinked subunits that resemble the desired 3D structure by: forming a subunit of the plurality of interlinked subunits by traversing the input material through at least one loop of at least one previously-formed subunit, thereby interlinking the formed subunit with the at least one previously-formed subunit; and selecting the at least one previously-formed subunit through which the formed subunit traverses, the selection made such that the interlinked formed subunit and at least one previously-formed subunit are disposed adjacent each other, such that a volume of the stitch additive manufactured 3D structure incrementally increases; forming a subunit of the plurality of interlinked subunits by traversing the input material through at least one loop of at least one previously-formed subunit, thereby interlinking the formed subunit with the at least one previously-formed subunit; and selecting the at least one previously-formed subunit through which the formed subunit traverses, the selection made such that the interlinked formed subunit and at least one previously-formed subunit are disposed adjacent each other, such that a volume of the stitch additive manufactured 3D structure incrementally increases; producing a stitch additive manufactured 3D structure based on the provided desired 3D structure, the produced stitch additive manufactured 3D structure including the plurality of interlinked subunits; and manipulating the stitch additive manufactured 3D structure during the additive manufacturing process by: contacting at least a portion of the stitch additive manufactured 3D structure with a protruding end effector (1206, 1219, 1603, 1614, 2303) of the stitch additive manufacturing machine; and applying a directed force onto the portion of the stitch additive manufactured 3D structure by translating the protruding end effector in a direction, thereby at least partially translating the portion of the stitch additive manufactured 3D structure and manipulating the shape of the portion. contacting at least a portion of the stitch additive manufactured 3D structure with a protruding end effector (1206, 1219, 1603, 1614, 2303) of the stitch additive manufacturing machine; and applying a directed force onto the portion of the stitch additive manufactured 3D structure by translating the protruding end effector in a direction, thereby at least partially translating the portion of the stitch additive manufactured 3D structure and manipulating the shape of the portion.