Why are there holes cut in to the OpenStreetMap model?

Article Details

Poster: peterm
Article ID: 1571
Posted: Tue 08 Nov 2016
Approved: Yes

Why are there holes cut in to the OpenStreetMap model where you place an imported model?

That's intentional.

The bounding box of your model is used for calculating the volume that the model occupies in the scene.

The OpenStreetMap function then "subtracts" this volume from the downloaded data, so that buildings, roads etc do not overlap your model.

That way you can easily create an in-fill project by inserting your model in the desired location.

If the bounding box of your imported model is too big, so that too much of the OpenStreetMap model is removed (for example if the model contains two houses far from each other), we recommend importing the model in separate parts.

OpenStreetMap downloads its data based on tiles for each part of the data.
If your Imported Model is smaller than an OpenStreetMap tile (about 0.5 to 0.75m) it will only subtract the tile if you place the model right at the middle of one of the tiles.  

The cut-out does not apply to entourage from the Lumion Library.

An option to reduce the underlying terrain that can be seen is to paint the Terrain underneath the areas of the cut-out.  Whilst not perfect it does help to reduce the obvious color differences.

To capture the colours of the OpenStreetMap adjoining the model, create a few 256x256 tileable images of a single colour, and add those to the Terrain texture tiles for a spare slot. Paint the terrain where the jaggies appear.  This has the effect of “merging” the background colour so the jaggies can look a little less obvious than for example a green terrain background.

1. With an image editor such as Photoshop or Affinity, use the Color Picker tool to select a color on the OpenStreetMap near the cut-out.  Create a tileable texture.

Example Tileable PNG:


2. In Lumion, select a spare Terrain Slot and click on Edit Type up arrow button:

3. Click on Custom Diffuse slot:

4. Select the tileable image you have created:

5. Paint the Lumion Terrain:

Alternatively, if you do not need to see the underlying terrain anywhere, you could as another option, just change the Terrain Texture Slot 1 to one of the primary colors of the OpenStreetMap.

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