Realistic Exhaust – Dynamic Smoke for Combustion Engines

This mod replaces the simple preset exhaust smoke with a dynamic exhaust model for vehicles powered by combustion engines. Smoke color, density, volume, and spread are calculated in real time from the engine's current operating state.

• Individual engine character: A library of 16 preconfigured profiles takes fuel type, power, model year, engine design, and emissions equipment into account. Older naturally aspirated diesels, modern turbo diesels, gasoline engines, and two-stroke engines each behave differently.
• Dynamic exhaust behavior: Throttle input, engine speed, load changes, turbochargers, boost pressure, and the soot limit all affect the smoke. A brief blackout produces dense, deep black smoke, while increasing boost makes the exhaust lighter and thinner.
• Cold and warm engines: Cold engines produce white or bluish-white vapor. This effect gradually fades as the engine temperature rises.
• Natural particle behavior: Newly emitted smoke receives the correct color and particle size. Existing particles then age naturally, disperse, and fray apart without flickering or changing color abruptly.
• Environmental effects: Wind, cold, rain, and warm air influence the exhaust plume. Rain removes soot from the smoke cloud, while cold and humid conditions make water vapor more visible.
• Multiple exhaust systems: Every visible exhaust pipe creates its own appropriately scaled exhaust plume. Motorcycles receive heat shimmer only, while electric vehicles and bicycles produce no exhaust smoke.

Procedural smoke textures with soft aging stages, self-shadows, and mipmaps provide stable visuals at long distances. The mod supports combustion engines from the base game, DLCs, and other mods, regardless of load order. Profiles and vehicle assignment rules can be customized in data/engineLibrary.xml.