Pivot Point
The origin a mesh transforms around
Also known as: Origin · Anchor point
Definition
The pivot point is the origin a mesh rotates, scales, and translates around when placed in an engine. For props it usually sits at the base contact point (a chair on the floor, a wall flush with the grid); for doors it sits along the hinge edge so rotation reads correctly. Pivot mistakes are one of the most common reasons modular kits "do not snap right" in the engine — fix at export, not at runtime.
In production
In Maya and Blender, the pivot (Blender calls it the "origin") defaults to the object's local centre on creation, but modular kit pieces need it manually moved to the grid-snap point — the base centre for a floor tile, the hinge edge for a door, the socket end for a pipe segment. Unreal Engine's Modeling Tools and Unity's ProBuilder both let artists re-set the pivot post-import, but it's considered bad practice since it desyncs the in-engine pivot from the source file, causing confusion the next time the asset is re-exported and overwrites the fix. A door hinge with a pivot placed at the door's centre instead of its edge will rotate through the wall instead of swinging open correctly — one of the most common modular-kit bugs reported in a level-design pass. Getting pivots right at the DCC-export stage rather than patching them in-engine is standard pipeline discipline, since Unreal's snapping grid and Blueprint-driven interactable doors both assume the mesh's origin is the functional pivot, not an arbitrary bounding-box centre.
