QuickTip: Custom/Cutout Track Pieces in SCARM Layout Plan

The information in this post is outdated/expired and is not relevant to the current release of SCARM.

If you want to use custom tracks or cutouts of the standard track pieces for your layout, you can draw them in SCARM using a flex-tracks. You can shape them with the mouse or you may enter the exact dimensions using the Toolbox (first item in Tools menu).

However, if your favorite library does not contain flexible tracks and you intend to cut a real track pieces for your layout, you can switch to another library (with the same track gauge and scale) and use flex-tracks from there.

Here is a list with some libraries, containing flexes in most popular scales and gauges:

Scale Gauge Library Flex-track piece(s)
HO 16.5 mm Atlas-HO-83 500, 502
HO 16.5 mm Fleischmann-HO-Model 6006
HO 16.5 mm Peco-HO-83 SL-8300
HO 16.5 mm PIKO-HO-A G940
HO 16.5 mm Roco-HO-Ln 42400, 42401
HO 16.5 mm Tillig-HO-Ellite 85125, 85134, 85136
OO 16.5 mm Hornby-OO R621
OO 16.5 mm Peco-OO-100 SL-100, SL-102, SL-102B
N 9 mm Atlas 2500
N 9 mm Fleischmann-N-Piccolo 9106
N 9 mm Peco-N-80 SL-300, SL-302
N 9 mm Roco-N 22200, 22201
N 9 mm Trix-N-Minitrix 14901
O 32 mm Atlas-O-2 7056 (2-rail)
O 32 mm Atlas-O-3 6054 (3-rail)
G 45 mm Peco-G-250 SL-900
I 45 mm Peco-I-200 SL-800
Z 6.5 mm Marklin-Z 8594
Z 6.5 mm Peco-Z-60 SL-200
TT 12 mm Tillig-TT-Adv 83125, 83134, 83136

You can make all your needed custom/cutout straight or curved tracks and then save them in separate project file. When needed, you can just copy and paste them between two simultaneously running SCARM instances.

Special snip-off feature is available in SCARM, starting from version 0.9.30.

See also
How to work with flex-tracks

6 thoughts on “QuickTip: Custom/Cutout Track Pieces in SCARM Layout Plan

  1. to make a a O-42 turnout..in MTH..
    place an O-42 curve set at X 25 : Y 10…
    then set a new start point at X 36 : Y 10. place a 10″ Gt
    Which will make the straight 11″ long…
    go to Atlas 3 rail..
    create new start point at X 25 : Y 10…set 40″ Flex/wood…it will connect to existing 10″ GT

    save file…
    repeat as needed for

  2. Hello Milen,
    First of all i want to thank you for creating this super layout program! SCARM works great and very intuitive! I noticed that the scarm and lib files are in ASCII format and can therefore be modified with notepad to alter/add your own modifications as a user. Now for my question: is it possible to alter the texture of the railbedding and the color of the sleepers as a user or is that hardcoded into the program? I ask this because i want to create the nostalgic Marklin Metal railbedding look with the black sleepers and maybe when it’s possible a 3rd rail addition.

  3. Hello Peter,

    Unfortunately, the texture and colors of the tracks and sleepers are hard-coded in the program and cannot be changed from the files. I will improve this behavior (at least for the colors) in some of the next versions of SCARM, but cannot promise when, as this will affect the file formats and internal data structures, together with the compatibility with the previous versions.

  4. Amazing program thanks for making and freely sharing it.

    Is there any way to cut/modify turnout pieces? I am drawing my HO modular club’s layout in SCARM. (http://jpsrr.weebly.com/) We had to modify several turnouts including cutting off track leads of a Walthers 3 way turnout and modify the radii of a Peco curved switch. As far as I know I can’t make a custom turnout using flextrack as mention in this article.


  5. Hello Josh,

    One way to make custom turnouts is to modify the library files. They are plain text files that can be opened in Notepad. Copy the row with the desired turnout in a new line, change the name and number in order to distinguish from the original and then change the parameters in order to get desired dimensions and geometry. See the description of the parameters in the following sample library: http://www.scarm.info/temp/BTTB-TT.lib

    Another way, i.e. if you just need a shortened leg is to overlap it with the next track piece – they will not join, but in that way you can make i.e. a crossover with smaller parallel distance.

    You can also make a custom turnouts completely from flex tracks in the same way, but they will not join together in the starting point.

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