Narrow Gauge rails readme

 - Replacement track graphics for TTD Patch
 - Public beta release; version 0.91

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What are the narrow gauge rails for?
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This grf is intended to provide a set of narrow gauge track to use either alongside the original tracks in Transport Tycoon Deluxe (with Patch), or to replace them completely.

They can replace any of the three track types (rail, monorail, maglev) in three of the game's environments (temperate, arctic and tropic). Therefore one set of NG tracks can be used for any of the narrow gauge train sets released or in development.

The narrow gauge rails grf also provides a new train depot to distinguish it further from the other rail types.

What narrow gauge train sets are there?
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Current (known) narrow gauge train sets include:

 - UK Narrow Gauge set (http://users.tt-forums.net/narrowgauge/)
 - Narrow Gauge component of Canadian set (http://users2.tt-forums.net/danmack/index.html)
 - Narrow Gauge component of Serbian set (http://www.geocities.com/wilesttdpage/076vehicles.htm)

Who drew the narrow gauge rails?
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The narrow gauge rails were drawn by Cornelius, but are based on the original TTD rails and no ownership of or copyright on the amended sprites is claimed.

How to install the narrow gauge rails
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 - Configuring newgrf[w].cfg
 
The narrow gauge rails are available in Windows (ngrailsw.grf) and DOS (ngrails.grf) versions. Simply copy the grf file into the "newgrf" directory under your TTD main directory and add the entry "newgrf/ngrails[w].grf" to your "newgrf[w].cfg" file. 

You will need TTD Patch version 2.0.1 alpha 49 (or higher) to run this grf because it uses new features only available since this version. You can get the latest alpha version from http://www.ttdpatch.net/src/ if you don't have it already.

When active the narrow gauge rails will appear in all compatible climates. Simply turn them off in the new graphics menu to disable them in a particular game if not required.

 - Supplying parameters to the narrow gauge rails grf
 
To replace the desired rail type with narrow gauge rails you must add a parameter to the line in your newgrf[w].cfg file. These are as follows:

 ** ngrails[w].grf 1 ** Replace normail rails
 ** ngrails[w].grf 2 ** Replace monorail
 ** ngrails[w].grf 4 ** Replace maglev
 
If you do not supply a parameter the default behaviour is to replace normal rails.

The narrow gauge rails grf works co-operatively with the electrifiedrailway and unifiedmaglev patch switches, and the electrified railway graphics. If you set ngrails to parameter 1 with electrifiedrailway turned on, you will get standard and electrified narrow gauge. If you are also playing with unifiedmaglev set to 1 or 2, the narrow gauge rails used with parameter 2 *or* 4 will then occupy the third track slot.

Please refer to the TTDPatch manual (http://wiki.ttdpatch.net/tiki-index.php?page=Manual) for full documentation on how to use the electrifiedrailway and unifiedmaglev patch switches.
 
 - Parameters and train sets
 
Please refer to the documentation for any individual train set for advice on how to set the ngrails.grf parameter to work with that set.

Known limitations of the narrow gauge rails grf
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The following features are currently considered out of scope for the narrow gauge rails grf

 - Compatibility with non-standard road sets
 - Guaranteed compatibility with new bridge sets or tunnel mouths
 - Use with the Toyland environment
 - Incorrect base tiles if used with Alpine Climate
 
If you wish to supply your own graphics to remedy any of these restrictions please comment in the release thread on www.tt-forums.net. Other suggestions may also be made in the forums.

History
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0.91
 
 - Arctic snow rails corrected

0.9

 - Public beta version
 
Notes
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This readme document was based on that used for the US Transition Set, but created independently.

The GRF ID for ngrails[w].grf is 73 66 02 01 