Blender and BTG

With the use of a special import&export script, BTG files can be opened in and exported from Blender. This makes it possible to edit FlightGear's terrain and specifically airports in a visual editor.

User documentation

Installation

Download the two scripts:

• Import script
• Export script

Place both files in your Blender's .blender/scripts/ directory. Common locations are:

• Windows: C:/Program Files/Blender Foundation/Blender/.blender/scripts

Usage

Import

Import via File > Import > Simgear (.btg).

Export

1. Export to a file without extension, via File > Export > Simgear (.btg). Make sure to enter the correct coordinates and radius, as displayed in the console and screen on import.
2. Package/zip the created file to a .btg.gz file. This one can be loaded into FlightGear.

Known issues

• Textures are not applied automatically in Blender.
• No textures at all on terrain import. Terrain is imported as one big mesh, despite various materials.
• Terrain is not lined up with the axis, making it hard to edit correctly.
• Airport lights are not imported.
• Imported meshes are shrinked.