While "deep feature" isn't a standard technical term in the game, it most likely refers to the this mod provides for Schumi's reworked truck models—such as the DAF XF106, Iveco Hi-Way, or Renault Premium—which often have different geometry than the base game vehicles. Key Details of the Mod
It provides high-resolution 2D wireframe layouts (templates) that show exactly where graphics will appear on a 3D truck or trailer model. TEMPLATE FOR TRUCK AND TRAILERS BY SCHUMI V1.0 ...
The "Template for Truck and Trailers by Schumi" is a popular mod package for designed to help players create custom "skins" (paint jobs) for vehicles modified by the well-known modder Schumi . While "deep feature" isn't a standard technical term
You can find the latest versions of these templates and truck packs on community hubs like the SCS Software Forums or specialized mod sites like ETS2World . You can find the latest versions of these