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Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Sun Free.
Sun v1.1
NOTE If this download link require a Decryption key, please enter this key: ann6IhCeYSlxXRsYobieIeP_0jZ9lzhNhmgHKX56FIE
Animated Sun is an simple animated texture model, it comes with easy to use scripts to achieve the animated effect.
Features
• 2048px High Quality Animated Textures
• 2x flares with unique appearance
• Animated glow effects
Compatible with Unity 5.1 up to new versions of Unity(2020+)
Support available for assistance if any problems should occur.