A non-transitory computer-readable medium on which is stored computer-readable instructions that when executed by a processor , cause the processor to: obtain a digital model of an item to be fabricated by a three-dimensional fabrication system , the digital model including either a plurality of pores or the digital model to be processed to algorithmically add a plurality of pores to the digital model , wherein the pores traverse a curved section of the digital model ; identify within the digital model , pores along the curved section that fail to comply with a predefined constraint, wherein the predefined constraint comprises an inter-pore distance constraint, an inter-pore cross-sectional area constraint, or a combination thereof, wherein the inter-pore distance constraint is a minimum distance at which the material between adjacent pores meets a predefined minimum strength level and the inter-pore cross-sectional area constraint is a minimum cross-sectional area at which the material between adjacent pores meets the predefined minimum strength level; based on the identification of the pores along the curved section that fail to comply with the predefined constraint, modify the digital model by executing a decimation operation on the pores that are identified as failing to comply with the predefined constraint to remove at least some of the identified pores to cause remaining pores along the curved section to comply with the predefined constraint; and cause the 3D fabrication system to fabricate the item according to the modified digital model , wherein the item to be fabricated comprises a forming mold , a forming screen , a transfer mold , a transfer screen, or a combination thereof. obtain a digital model of an item to be fabricated by a three-dimensional fabrication system , the digital model including either a plurality of pores or the digital model to be processed to algorithmically add a plurality of pores to the digital model , wherein the pores traverse a curved section of the digital model ; identify within the digital model , pores along the curved section that fail to comply with a predefined constraint, wherein the predefined constraint comprises an inter-pore distance constraint, an inter-pore cross-sectional area constraint, or a combination thereof, wherein the inter-pore distance constraint is a minimum distance at which the material between adjacent pores meets a predefined minimum strength level and the inter-pore cross-sectional area constraint is a minimum cross-sectional area at which the material between adjacent pores meets the predefined minimum strength level; based on the identification of the pores along the curved section that fail to comply with the predefined constraint, modify the digital model by executing a decimation operation on the pores that are identified as failing to comply with the predefined constraint to remove at least some of the identified pores to cause remaining pores along the curved section to comply with the predefined constraint; and cause the 3D fabrication system to fabricate the item according to the modified digital model , wherein the item to be fabricated comprises a forming mold , a forming screen , a transfer mold , a transfer screen, or a combination thereof. <EOS>