Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the zip.

Usage

1. Build or open your scene and set up the camera you will render from.
2. Open the sidebar in the 3D Viewport (N) and go to the Mountains tab.
3. With nothing selected, pick a landscape picture with the arrows or by clicking it, choose 360°, Camera or Arc coverage and whether you want fog, then press Add Mountains.
4. The mountains fit around your scene. Select the Faraway Mountains object to edit it: New Variation, Distance, Height (in degrees of the view), Ranges, Fog Density and City Lights are on top.
5. Shape, Snow, Forest & Air, Fog, City Lights and Ground & Detail hold the finer settings.
6. Moved or added objects? Press Refit to Scene. Changed the world? Press Match Sky.

Tips

• Camera coverage builds only what the camera sees, for the lightest scene.
• Fog bands look best from about eye height.
• Raise Air Brightness for bright HDRIs and strong suns.
• City lights show best under a dusk or night sky; raise Light Brightness for brighter skies.