Downloading and setuping the Blueprint input data.

You can setup 4 input data files to your blueprint document to generate a scene.

Input data setup

For all four files, the right button open the website, in your browser, where you can download it from.

OpenStreetMap File

The OpenStreetMap file is mandatory, and you can only setup one OpenStreetMap file per blueprint document.


OpenStreetMap is a free, editable map of the whole world that is being built by volunteers largely from scratch and released with an open-content license.

To download your file :

Once the file is downloaded :

Cadastre File(s)

The cadastre files are optional, but without a cadastre file, you will not be able to generate the gardens and sidewalks automatically from the blueprint. You can add as many cadastre files as you need to cover all the buildings of your OSM file (for instance if you have 3 villages in your zone, it is likely that you will need 3 cadastre files).


Cadastre files are free for download and availiable for all towns of France from a gouvernment website.

To download a cadastre file of one town :

Once the file is downloaded :

ASC File(s)

The ASC files are elevation maps that the Blueprint uses to generate the real terrain underneath your town. These files are optional, you can choose to keep your scene flat or to use an artistic terrain that will not match the real relief of your area.


ASC files are free for download from the IGN website, constructed from a LIDAR technology, and are availiable in 3 different precisions : 25m, 5m and 1m. We advise the 5m for NDunes rendering, but all 3 area supported.

The ASC files are classified per department, so you have to download an entire department folder with all the ASC files covering the department:

To create your primary soil from the ASC files, we have developped a tool to make it as easy as possible. In the Blueprint view, click on the light bulb icon next to "ASC files:"

In the "ASC Files" helper pannel:

Troubleshooting :

After clicking on "Create Soil", you could get the following warning pannel if NDunes has not found in the folder all the necessary ASC files to cover the requested area.

It can happen in two cases :

Blueprint Stylesheet

What is a blueprint stylesheet

A Blueprint stylesheet (or Blueprint template) is a particular type of Blueprint document. When you create a Blueprint document, the first field you see in the view is "Generate a Scene", which is what you're learning to setup right now in this tutorial. However, if you switch this field to "Setup a template", you're now designing a stylesheet/template that will associate caracteristics to OpenStreetMap objects, as well as general scene specifications.

For instance here, an OSM land area of type "Rock" will be generated in NDunes as a decal area with a Soil document named Rocky_Soil_1. The "Bog" OSM area will have the biome "Wetland" spawn in it. For general scene specifications, we can see here the biome SparseForest will spawn in the outskirts of the scene.

How do I get a Blueprint Stylesheet ?

1) Blueprint stylesheets can be created by yourself, which means you have to :

2) Or you can download a ready-to-use stylesheet from the NDunes' store. Our stylesheets are setup by artists to respect a visual coherence, as well as optimize the balance between perfomances and rendering quality in NDunes. To download an NDunes stylesheet:

Once you've hit the download button, you will be invited to open NDunes : accept. In NDunes, the download of the stylesheet will begin. Downloading a stylesheet means downloading all the documents (soils, biomes...) that this stylesheet is using. This operation can take a while as there is a lot of 3D data (up to 30 minutes depending on your internet connection). NDunes will be freezed during this process, please wait and dont try to cancel the download by killing NDunes.

Now that you have your stylesheet

Now that you have a Blueprint stylesheet, you can select it using the "Blueprint template" document selector. As soon as you have set the Blueprint template, all the OSM categories and Scene parameters of your blueprint will fill up automatically.

Note that if you had already changed valus in the Scene Parameters of Customization of classes sections, they will be overriden by the new stylesheet values.

If you want to customize the stylesheet values, please refer to Customization of classes and Scene parameters. If you want to generate your scene based entirely on the style defined by the template, you can skip those two steps and go directly to Generating the scene