Let's talk about how we can distinguish technology by visuals on vehicles: Engines: Bio-Diesel: A variation on a green recycling logo. Gas-Turbine: A gas symbol, visible gas cylinders. Adv-Coolant: Blue coolant injectors or a big ass fan with blue below. (I forget the other engines) Weapons: High explosive: No difference Railgun: That dual rail setup you see for railguns. Armor: Composite: Tiled hexagonal plating texture. Reactive: Thick plates over existing armor. Reflective: Small, multi-angled faceted texture. Please post any ideas you have!