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Nanbu Tekki making experimental (南部鉄器)

First, I tried generating bumpy surface using Geometry Nodes. Finally I gave up it because so hard.
Instead of the way, using ball with modifiers of Curve and Array by hand. Sphere is arranged 11mm, 15mm span, for Z axis, alternate 13mm.
#Blender この前苦戦してた南部鉄器のポツポツ、結局力技で突破した。Curve+Arrayでゴリ押し。でも期待したボツボツにはなった。
ポツポツはSphere-Φ11mm、Z軸の間隔は15mmで、交互に13mmずつArrayのRotation Zをずらした

Final rendering result 1.

Final rendering result 1.

Final rendering result 2.

Final rendering result 2.

Final rendering result of detail.

Final rendering result of detail.

Generate bumpy using sphere with curve and array.

Generate bumpy using sphere with curve and array.

Wireframe.

Wireframe.

Reference: Real photo.

Reference: Real photo.