Additive manufacturing system

An additive manufacturing apparatus comprising:

• a stage configured to hold a component formed from one or more layers of a resin;
• a radiant energy device operable to generate and project energy in a predetermined pattern;
• a support plate at least partially positioned between the radiant energy device and the stage;
• a material depositor configured to apply the resin on a resin support, the resin having a first viscosity, wherein the material depositor is configured as a transfer roller positioned below the resin support and configured to apply the resin to the resin support upstream of the stage;
• and
• a viscosity modification assembly configured to alter the first viscosity of the resin to a second viscosity.