Depending on your goal (academic, technical, or a guide), here are three "paper" concepts you could develop:
To understand why RoR mods are so coveted, you must understand the engine. Unlike games that use "rigid body" physics (where a car is a solid block until a health bar says it’s broken), RoR uses a node-and-beam structure. Every vehicle is a skeleton of interconnected points (nodes) and beams rigs of rods mods
Which of these directions sounds most interesting, or were you looking for a physical papercraft template for one of the trucks? How to Install Content (Mods) into Rigs of Rods! Depending on your goal (academic, technical, or a