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NPC ships leaves condensation trails. Rocks make gray vapour when move.

Player ship will not make trail to avoid disturbing the aft view.

Based on Zireael's Engine Trails but rewritten from scratch to avoid the "Universe is full" error.

The default lifetime of a trail element is 9 seconds, the maximal length is 300m and will be reduced automatically when the total number of entities step over 1500.

The lifetime and the number of used light sources will be reduced below 25 FPS which cause thicker trails.

No trails in Red Alert below 50 FPS if weapons are online for smooth combat.

Visual elements based on the fuel leak effect in CommonSenseOTB's CustomShields OXP.

Trail Detector

This equipment is placed into a separated package due to can help to detect far ships a bit over scanner range with your eyes.

Install Trail_Detector_1.0.oxz (downloaded 1475 times) then buy Trail Detector in equipment shop for 100 Cr to enlighten engine trails of other ships. Small ships make as strong trails as large ships with this equipment.


Trails1.png Trails2.png Trails3.png Trails4.png


Do not unzip the .oxz file, just move into the AddOns folder of your Oolite installation.


This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License version 4.0. If you are re-using any piece of this OXP, please let me know by sending an e-mail to norbylite at


2016.05.22. v1.11 No trails after mini ships below 10t mass like TIE Fighters.
2016.02.16. v1.9  No trails in Red Alert below 50 FPS if weapons are online for smooth combat.
                  Fixed trail on Gnat, thanks to phkb.
2016.02.15. v1.8  Render trail elements in sight and within 15km only, others moved far away.
                  Lifetime of elements start at 9 seconds and step down to 5 seconds in low-FPS.
2016.02.14. v1.7  New low-FPS mode added.
2016.02.13. v1.6  Time-based trail dissipation so trail length is depending on speed.
                  Less visible trails at long range.
                  Thinner trail on small ships.
                  Missiles are excluded.
2016.02.03. v1.5  Sparks in Griff Alloys and Wreckage OXP are excluded for explosions.
2016.02.03. v1.4  Wreckages, alloys and cargopods are excluded for speed up explosions.
                  Increase quality back to normal over 50 FPS and not the double of MinFPS.
2016.02.03. v1.3  Rocks make gray vapour when move.
                  Speedup for explosions: wreckages make rare trail only.
                  General speedup due to less flashers (half than before).
                  Another speedup on trails over 12km.
                  Default of MinFPS is increased to 25 FPS.
                  Fixed an oddity with Telescope.
2015.05.01. v1.2  Escort ships on EscortDeck does not exhaust fumes anymore.
                  Fixed a gap after fast ships.
                  No more trails after ships without exhaust like Thargoids, Nyoka.
                  Steam trails after moving rocks.
                  Always use less flashers in trails over 10km.
                  Trail starts near the engine.
2015.05.01. v1.1  Use less flashers in trails for better performance.
                  Visibility of trails increased up to 2x scanner range.
2015.04.30. v1.0  First release.


Trails_1.11.oxz (downloaded 5670 times).

Trails_1.9.oxz (downloaded 1215 times).

Trails_1.8.oxz (downloaded 155 times).

Trails_1.7.oxz (downloaded 153 times).

Trails_1.6.oxz (downloaded 106 times).

Trails_1.5.oxz (downloaded 274 times).

Trails_1.4.oxz (downloaded 107 times).

Trails_1.3.oxz (downloaded 98 times).

Trails_1.2.oxz (downloaded 3457 times).

Trails_1.1.oxz (downloaded 157 times).

Trails_1.0.oxz (downloaded 168 times).

Quick Facts

Version Released License Features Category Author(s) Feedback
1.11 2016-05-22 CC BY-NC-SA 4 Condensation trails Ambience OXPs Norby BB-Link