Watch how stacked steel becomes a Damascus pattern. Adjust base layers, fold count, twist rate, and grind depth to preview the cross-section a bladesmith would reveal. Everything is computed locally in your browser — no uploads, no AI, no signup.
Geometric visualization of pattern welding, not a physical metal-flow simulation. Real Damascus varies with steel, heat, and hammering — use this as a concept preview.
A bladesmith stacks alternating layers of high-nickel steel (such as 15N20, which etches bright) and high-carbon steel (such as 1084, which etches dark), forge-welds the stack into a solid billet, then folds and twists it. The final pattern stays hidden until the blade is ground and etched. Because the layers remain distinct, the grind angle and depth decide which part of the stack shows on the surface.
Twisting converts flat parallel layers into a helix. When you grind a flat surface into a twisted bar, the surface cuts across the helix at different angles along its length, producing radiating or chevron-like lines. A higher twist rate means more rotations per unit length and a tighter, denser pattern; a shallower grind shows a narrower slice while a deeper grind toward the center reveals wider, bolder lines.
This tool is a geometric preview, not a metal-flow simulation. Real Damascus varies with steel composition, forge temperature, hammering direction, and etch chemistry. Use the exported PNG as a starting reference when discussing a commission or planning a billet, and let an experienced bladesmith confirm the final pattern from the actual steel.