Plural of hatching; the process of eggs breaking open to release young animals, or the artistic technique of making parallel lines to create shading.
From hatch (Old English hæccan 'to produce young') + -ing suffix + -s plural. The term applies to both biological emergence and artistic drawing technique.
Renaissance artists like Leonardo da Vinci perfected hatching to create incredibly realistic shading with just pen and ink—it's like using mathematics to paint with lines!
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