underlay for 2D presentations (On-Screen-Display)
default Z-layer for main presentations
overlay for 3D presentations which inherits Depth from previous ZLayer
overlay for 3D presentations with independent Depth
overlay for 2D presentations (On-Screen-Display)
identifier for invalid ZLayer
This enumeration defines the list of predefined layers, which can not be removed (but settings can be overridden). It reflects values of corresponding C++
Graphic3d_ZLayerIdenumeration defined by OCCT, Custom layers might be added with positive index (>= 1) if standard list is insufficient for application needs; these layers will be displayed on top of predefined ones.