Subdivision modifier

A Subdivision modifier is a tool in 3D software that splits a mesh into smaller polygons in a controlled way, producing a smoother, more detailed surface. It typically uses a subdivision scheme (for example Catmull–Clark) to add new vertices and faces while preserving the object's overall shape rather than radically changing it. Subdivision is widely used in 3D modeling for creating smooth organic forms and finer detail; parameters like subdivision levels, creases, and adaptive subdivision let you balance detail and performance.

Imagine modeling a character head: you begin with a coarse quad mesh that defines the general shape, then apply a Subdivision modifier to smooth the surface and achieve subtle curvature without moving every vertex manually. For hard-surface parts like a car door or furniture edge, you can combine creases or additional edge loops with the modifier so that sharp edges remain while the rest of the surface becomes smooth. Consider performance: higher subdivision levels dramatically increase vertex count, so use lower levels in the viewport and higher levels only for final renders, or use adaptive subdivision to allocate detail where needed.