Russian developer HighSkyTech have released their second X-Plane plugin; xAmbience. The new weather addon was slated to release on November 28, however due to issues in pre-release testing, it was delayed until the end of December and then to early January.

The plugin features a custom atmosphere model with Raleigh-scattering and a custom seasons engine, which works with default terrain (it is incompatible with Orthoimagery).

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Here's the full feature list:

Main

• Custom clouds with many rendering logic and blending
• Custom atmosphere rendering
• Water system rendering
• Advanced plugin controls
• 20+ sliders for control full x-plane global sphere.
• Simulate true visibility effects and haze effects
• Seasonal ground textures with advanced auto-change mode.

Clouds

• Custom cloud draw
• Advanced controls
• Cloud lightning model, depends at real weather situation and time.
• Custom cloud shadow system with realistic effects
• Custom cloud formation.
• 10 cloud texture solutions with automatic install in plugin
• 2 Rendering types: Detailed, Simple.
• Cloud illumination from ground lights

Atmosphere

• Custom visibility rendering
• Advanced atmosphere rendering
• Algorithmic Sky rendering model with custom controls
• Sphere saturation control
• 16 sky colors with custom lightning effects
• Advanced fog implementation with 3d effects
• Sky city lights effects

Water

• Custom water rendering model with effects, 3d waves and lightness
• Mist on water effects
• Custom wave amplitude model
• Advanced settings

Other 

• Custom lightness
• Custom post processing effects
• Custom cockpit shadow effects with immersive effects
• Shadow intensity controls
• Seasons implementation
• Snow effects

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In the FAQ section HighSkyTech say that the new weather plugin is compatible with weather engines such as FS Global Real Weather and ASXP.

You can purchase xAmbience for $34.99 on the X-Plane.org store.