Extrusion :

- nutsnbolts :
  - a no-code, design-time only sample rendering of a nut and accompanying bolt
  - uses TRevolutionSolid, TCylinder and TAnnulus to build both items
- pawn :
  - basic TRevolutionSolid use to make a wood-textured pawn-like object
  - various interactive controls to check the effects of various properties on visual aspect
- bendingcyl :
  - uses TPipe, the circle extrusion component
  - a bending cylinder getting fat/slim
- cutoutstar :
  - using TExtrusionSolid to render an extruded object
  - cutting out parts in a TExtrusionSolid (or TMultiPolygon)
- tentacles :
  - using TPipe for weirdo tentacles effects, per-node coloring
  - adjusting ObjectStyle to speed up rendering of constantly changing geometry

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