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 .

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 .

It provides high-resolution 2D wireframe layouts (templates) that show exactly where graphics will appear on a 3D truck or trailer model.

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

Typically includes templates for various cabin types, chassis, and side skirts specifically for Schumi’s "Reworked" truck series.