A method of forming an optical component includes depositing slurry that includes glass powder material onto a facesheet and fusing the glass powder material to a facesheet to form a first core material layer on the facesheet. The method also includes successively fusing glass powder material in a plurality of additional core material layers to build a core material structure on the facesheet. The method can include selectively depositing slurry including glass powder material over only a portion of at least one of the facesheet, the first core material layer, and/or the one of the additional core material layers. Depositing the slurry can include extruding the slurry from an extruder.