The Model SOP holds the surface modeler in TouchDesigner. It is designed to hold raw model geometry constructed using the SOP Editor (aka Modeler). It holds modeled data and cannot be unlocked - protecting you from losing your model data.
Any SOP can be locked and modified with the modeler.
Uses / Works in Relation With
This SOP can be used to generate profiles for the Extrude SOP, cross-sections for skins, sweeps and rails. Model can also be used to model Metaball objects to be used as force fields in the Force SOP for pops and particle systems, and to define envelopes for L-systems pruning.