There is still a lot of misinformation and hype relating to 3d printing. 

Here is a quick breakdown of how 3d print printing works. 

Either
Select a suitable CAD application software.
Create and complete the design.
Save and export the design into 3D printing STL file format.
or
Download the design in stl format from internet
Pick a suitable slicer program.
Allow the slicer to convert the STL file into a printable G-code.

I found this online which might help

Slicing means converting the 3D model file into a machine language that can be recognized by the printer, and the printer can only print successfully after recognizing this machine language. This machine language is called the G-Code file.
Support structures are an integral part of the FDM 3D printing process. In short, they help 3D printers overcome certain design limitations, like geometries with steep angles and overhangs. Today, most slicer programs automatically generate supports, making it easy for makers to use them.

After 10 years being involved in designing models for 3D printing, using Shapeways to do the actual printing, I felt it was time to look at ways to offer the print files to modelers to print themselves. I have had lots of requests but have also heard or been told of problems, but now believe it is possible for modelers with their own printers to print many of my designs.
Initially I planned to sell collections of stl files, but now Shapeways are testing a new pay for download option, for private use only, so I have put my original plan on hold for the moment as Shapeways have included some of my designs in the trial.

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Prior to this

My original idea was that the narrow gauge designs were a good collection to start with. Most have versions in several scales, and designs range from WW1 locos and wagons, to Swedish narrow gauge railcars.  Most are quite small, even in bigger scales so should be printable on home or club printers. 

 Prices for  approximately 180 designs would be £20 (1000) or £35(500). 

Crowdfunding(Kickstarter?) is best way to continue

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contact me for info by email 

recreation21@hotmail.co.uk, or via Shapeways personal message system

3D Printed Designs

As there are now so many designs on my database, this front end should make it easier to find items

3D printed trackwork	Complete Buildings including new terraced houses and shops Nissen Huts Provender/ Trader Goods Sheds Railway Signals Art Deco Station Buildings
	3D printed accessories Bridge building parts Across Board join Track Panels Operating Mechanisms  Working Level Crossing kits OO Barrow Crossing parts Building Parts and Furniture Brickwork panels
Narrow Gauge 3D printed narrow gauge locomotives  3D printed narrow gauge rolling stock 3D printed French Metre Gauge  3D printed Irish Narrow Gauge  3D printed British 3ft and over narrow gauge
	3D printed house and shop modules (Roof) 3D printed house and shop modules(Middle floor) 3D printed house and shop modules(Ground  floor) 3D printed warehouse modules
Standard Gauge  3D printed standard gauge locomotives  3D printed standard gauge coaches and railcars 3D printed standard gauge  wagons
Other counties and gauges   3D printed broad gauge locomotives  3D printed Irish 5ft 3in Broad Gauge 3D printed Finnish Railways  3D printed Swedish Railways  3D printed Portugal Railways  3D printed Non British Standard Gauge	3D printed road vehicles

Currently adding links to all my designs, 

all other designs please go to my Shapeways e-shop.

Designs by Rue d'Étropal