LFS Editor/Guides/Importing an external model

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Vehicle Mods

If you are using a file made by someone else as part of your model, even if you modify it, you will need to declare this when you upload your mod. You will need to specify the license that the original creator applied to the model and provide information such as the name of the creator and a link to a website where the license information is displayed. If no license is stated, by you or the original creator, you cannot upload the mod! Some licenses do not allow you to create work by changing the model you downloaded. Please check that the supplied license allows you to distribute modified versions of the original model.

LFS Editor allows importing external 3D models in OBJ format.

Prerequisites

• The 3D model must be in OBJ format.
• The file must be located in the data\obj folder and must have a .obj extension.
• The file must be exported properly to be useable in the LFS editor.

Scale

LFS uses metres for units. If you use another unit, please export using an appropriate scale.

Position

Your model should be approximately centred over the origin and ideally the body should sit on the ground (without the correct ride height).

Backface culling

Live for Speed uses single sided triangles. While modelling in blender and before exporting, make sure you look at your model with back face culling enabled so you can be sure the surfaces are facing the right way.

Export Settings

Transform:

• Y forward / Z up (so the model is oriented correctly in LFS)

Geometry:

• Write normals (so LFS can work out smoothing groups)
• Triangulate faces (as LFS geometry is based on triangles)

OBJ export settings in Blender

Importing an OBJ file into the editor

Importing an OBJ file into the modeller will replace an existing model.

1. 1 Open Modeller.
2. 2 In the bottom left corner of the screen, click OBJ.
3. 3 In the file selection dialog, select the file name and press OK.

OBJ import dialog in LFS Editor

Common errors when importing a model in LFS Editor

Vertex X is out of bounds

One of the vertices is more than 1024 metres away from the origin. This could be a problem of wrong scaling. LFS uses metres for units.

Too many vertices (32768)

The number of vertices exceeded the maximum limit of 32768 for OBJ import. Note that when importing a model into the LFS editor, it is possible to import only one half of the model and then use the mirror function to mirror the triangles to the other side automatically. The total limit of vertices or triangles is 65536.