Class 66 Megapack Version 1

Description

Updates

26/03/2025

  • Removed the "!!SEHS-RHTT-66MegaPackGBRFPatch" .pak file from the 66MegaPack Patches. If you are facing issues with Southeastern Highspeed not loading properly then please remove this mod from your DLC or UserContent folder.

26/07/2025

  • Fixed the emissives not working under certain graphics settings
  • Adjusted the DRS 66/0 marker lights intensity glow

25/07/2025

  • V1.0 Initial release

The Class 66 is the ubiquitous staple workhorse of the UK freight industry scene, anywhere that has a pair of rails you're likely to see one trundling along either pulling the usual intermodals, aggregates, biomass, ballast, railtours, etc.

However it's presence in TSW is less than ideal with seemingly only the original EWS & DB Cargo red liveries being present on every single modern day UK route. This simply wasn't going to cut it anymore and therefore something had to be done. This is where the Class 66 Megapack comes in which fixes what the community has been begging to see for years now!

The ultimate aim of this pack is to include almost every single type of Class 66 variant (within what's operated in the UK) that has ever existed, as well as the absolute plethora of liveries from early privatisation to the present day.

Megapack Roadmap:

This guideline does not strictly follow what I have planned, but more to give an idea of what I want to do moving forward.

  • Version 1 focuses on adding more liveries to expand on what TSW offers by default and also offers a never seen before newly modelled BMAC "bugeye" light cluster variant mostly carried by the Freightliner 66/5 & /6 subclasses as well as a fair chunk of the GBRf /7 fleet.

  • Version 2 will focus on the later built "low emission" examples adding even more external differences including the shorter fuel tanks, larger radiator vents, centre engine room doors and the BMAC Gen 2 headlight clusters (liveries for Version 2 TBC at a later date)

Thanks to the power of the public editor, any livery is able to be substituted onto a desired timetable service (both official and modded) and certain liveries will also spawn as AI too hopefully!

Due to the way Addon Manager works in TSW, not having all the required DLCs will cause TSW to either crash (or just not work at all). There's unfortunately no workaround for this, please bear that in mind when installing this mod.

Please read the "Known Issues" tab for any particular bug or issue that has already been noted before making a comment, thank you!

I would like to thank those who helped me throughout this project, especially with regards to the editor. This pack wouldn't be here without you :)

DO NOT re-upload this anywhere without my permission.
Please contact me either via DTL or Discord if you would like to use my plugin in your own TT mod.

Tags: class-66 class66 colas dbc drs enhancement enhancement-mod enhancement-pack freightliner gbrf megapack rhtt substitution train-mod tsw5 weathered

Dependencies

Highly recommened TT mod, specifically tailored to add some of my 66 liveries to various services

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Installation Instructions

To install, simply drag & drop the downloaded .pak files into your TSW "DLC" folder.

Additional Comments

KNOWN ISSUES/NITPICKS

  • The !!SEHS-RHTT-66MegaPackGBRFPatch" .pak file included with the 66MegaPack Patches folder may cause Southeastern Highspeed to not load properly. Currently cannot find a fix for this, if you have it installed and are facing issues then please remove it from your DLC or UserContent folder.

  • The numbers have a habit of duplicating themselves with the GBRf 66 RHTT SEHS Patch, I do not know why this happens and have not found a fix for it yet (use that patch at your own risk!)

  • All 66s have their swinghead buckeyes, I have tried to remove & replace these but to no avail. If I find a workaround it will be updated.

  • There is some light bleed with the top high intensity LED headlight, unfortunately, this is due to the way the RVVs are set up I do not know of a way to mitigate this issue yet.

  • The cab window materials are slightly broken on the GBRf 66/7s, I have no clue why this happens. I will look into it at a later date.

  • The GSM-R currently does not work and is only static. I would like to get this functional for a future installment, it is NOT a bug.

  • The tail lights turn on in an AI formation. Unfortunately this is a core issue and cannot be fixed.

  • The headlights flash in an AI formation. Again this is a core issue and cannot be fixed.

  • Liveries might not spawn in as AI properly. Unfortunately this has been one of the most annoying issues to try and find a solution for and it's very tempremental. Only potential method I can think of is restarting the service.

  • Emissives appear very bright on ToD3 routes. There's nothing I can do about that as this pack was designed for ToD4.

  • Class 385 drags do NOT work properly with my liveries currently.

  • The LED marker light LODs have a very short rendering distance, I have tried to adjust this but to no avail, I suspect this is a core issue

  • This pack is currently not compatible with RailDriver as I do not own one, nor do I know how to set it up within the Editor.

Files

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About this mod

Created
25 Jul 2025
Updated
26 Mar 2026
Game
Train Sim World
Type of content
Rolling stock
Train Sim World Content
Birmingham Cross-City Line, Brighton Main Line: London Victoria - Brighton, Cardiff City Network: Radur & Coryton to Penarth & Bae Caerdydd, Cargo Line Vol. 1 - Petroleum, Cargo Line Vol. 2 - Aggregates, Cargo Line Vol. 3 - Intermodal, Cargo Line Vol. 4 - Military, Cathcart Circle Line: Glasgow - Newton & Neilston, East Coast Mainline: Peterborough to Doncaster, East Coastway: Brighton - Eastbourne & Seaford, Fife Circle Line: Edinburgh - Markinch via Dunfermline & Kirkcaldy, Glossop Line: Manchester - Hadfield & Glossop, Great Western Express, London Overground Mildmay line: Stratford - Willesden Junction, London Overground Suffragette line: Gospel Oak - Barking Riverside, Manchester Airport Commuter, Midland Main Line: Leicester - Derby & Nottingham, Rail Head Treatment Train, ScotRail Express: Edinburgh - Glasgow, Southeastern Highspeed, West Coast Main Line: London Euston - Milton Keynes
Train Sim World Version
Train Sim World 5, Train Sim World 6