Steam Particle Overhaul

A complete overhaul of steam locomotive effects: new dynamic steam that matches every exhaust sound, plus new effects.

Features: - Chimney steam particles match the sound of each steam exhaust. Think "chuff, chuff, chuff" instead of the constant stream of steam in the original game. - Cylinder drain: steam particles and a hiss sound when a locomotive starts to move. - Idle steam from the chimney when the locomotive stands still. - All other steam particles (for example the cylinder steam) are also adjusted for a more realistic look. - Modern locomotives use the old chuff sounds. The modern sounds have a high-pitched glitch. - Steam density setting (50% to 300%) in the mod settings. Warning: high values may reduce performance. Recommended mod: SPO Rail Acceleration Reducer (#6461442). It makes trains accelerate more slowly. In my opinion this feels much more realistic. Which locomotives are changed: All steam locomotives, including locomotives from other mods, if they have a chimney emitter. Feedback and comments are welcome. Compatibility (please tell me if you want any specific mods checking): - IMPORTANT: LOAD SPO AFTER OTHER MODS THAT CHANGE STEAM LOCOMOTIVES. - Update 20/10/2026: SPO has been reworked for better compatibility. It should now work with most other mods, including mods that change or replace the game's train transformator. - Realistic Smoke: load it before SPO. Realistic Smoke adjusts the game's original steam particles, while SPO replaces them with a new dynamic steam system. Realistic Smoke's cylinder steam (stops at higher speeds) and whiter steam colour still work. Its chimney steam, including the grey chimney layer, is replaced by SPO. Credits: - The cylinder drain hiss (spo_cylinderdrain.wav) is an edited copy of the steam idle sound from Transport Fever 3 (Urban Games). - The sound script is based on the game's default sound script (Urban Games). - ClaudeAI helped with the scripts.