“Physical Starlight and Atmosphere” is a full outdoors lighting simulator that takes inspiration of ‘sandbox’ game worlds and editors, bringing visual consistency between every object in the scene.

Apart from our Sun, this addon can simulate any other star. Sky is not only static sky dome, but the whole atmosphere – from ground to the space and beyond. Calculations are based on physical properties of how light is interacting with gaseous medium.

This addon fills your Blender scene with air (or any gas of your liking) where density at the ground level is the highest and in the space – lowest, then a Star of your choice illuminates the air using physics laws – easy as that!

Outdoors lighting is essential and Blender still has no proper skylight system available. Preetham and Hosek-Wilkie sky included in Blender is very rudimentary and practically unusable. Even skylight systems in other software suites are very limited.

ITS 1.4.1 BETA VERSION AND OF COURSE IT INCLUDES CLOUDS!

Cinematic atmosphere
in a single click
Physical Starlight and Atmosphere is the most popular
atmosphere addon for Blender, which is setting the
new industry standard for lighting and real-time
interactivity with the atmosphere.

Why did 10’000+ users
choose PSA?
Pre-made presets. Save time and effort with pre-made presets, providing you with a list of ready-to-use settings that can instantly transform your scene and serve as a starting point for further customization.
Realtime speed and performance. Experience unparalleled speed and efficiency with real-time rendering, ensuring smooth performance during both editing and playback of your projects in Blender.
Animation options for every feature. Use keyframes to effortlessly animate each feature, giving you the ability to bring your scenes to life with a dynamic and captivating atmosphere and light tailored to your specific needs.
Highly customizable for full creative freedom. User-friendly interface, allowing even beginners to create stunning visuals with ease. Simply adjust the settings, and watch your scene transform.

1.8.3 – released 16.05.2025
new:

Import/export system for presets with archive validation and texture handling.
Batch import of presets from folder.
Notifications during import/export.
Preset deletion now cleans up texture files.
Improved file selection and texture path handling.
improvements:

Sun rotation now uses attributes instead of drivers.
Removed fog and redundant nodes to improve shader compile time.
Cleaner and more efficient shader node tree.
Export UI updated to match import flow.
fixed:

Fixed issues with preset export paths, image handling, and archive validation.