Layer Stack

Each layer internally keeps track of a “local” stack of layers that contribute to that layer. This stack is an ordered collection of layers used within this layer that contribute to its hierarchy and composition.

furniture_workbench01.usda layer stack

In the above, the layer furniture_workbench01.usda is made out of three other layers and itself. It adds the layers, furniture_workbench01_modelling.usda, furniture_workbench01_surfacing.usda and furniture_workbench01_rigging.usda in that order to its layer stack. Visually this order will look reversed as it is a stack after all, but the higher on the stack, the more “important” a layer is.

A layer’s Layer Stack always has its own data at the top of the stack, making itself the most important.