ISO 10303-518:2014
specifies the integrated resource constructs for
mechanical design shaded presentation.

ISO 10303-518:2014 specifies the use of ISO 10303 application interpreted construct satisfying the requirements for mechanical
design shaded presentations.
ISO 10303-518:2014 is mainly based on ISO 10303-46.
Point, curve, and surface styles may be specified for the constituents of any shape representation.
Shading and surface characteristics, such as reflectance and transparency are included.
The concept of layers is out of scope, as is the representation of text.