Additive manufacturing methods and systems

An additive manufacturing system for additively manufacturing a three-dimensional object, the additive manufacturing system comprising:

• a first irradiation device configured to generate a first energy beam;
• a first optical assembly configured to direct the first energy beam;
• and
• a control system configured to perform one or more control operations associated with the additive manufacturing system, wherein the one or more control operations comprise:
• irradiating a first build plane region using the first energy beam defining a beam diameter, the first energy beam travelling along a first oscillating path in a first direction to consolidate a first wall defining a thickness perpendicular to the first direction, wherein a build material adjacent a first side of the first wall and adjacent a second side of the first wall, opposite the first side of the first wall, remains unconsolidated;
• and
• wherein the thickness of the first wall is greater than the beam diameter of the first energy beam.