To use a downloaded sky preset, a user typically creates a and applies a material with the downloaded HDRI in the Luminance channel . For more advanced users, the Physical Sky tool in Cinema 4D allows for further customization of ozone, atmosphere, and sun intensity, often used in conjunction with presets to fine-tune the "time of day."
While they moved to a subscription model, they still provide free educational resources and occasional sample assets that include lighting rigs and HDRI sky setups. 3. How to Install Sky Presets in Cinema 4D Open the Asset Browser: Shift + F8 Window > Asset Browser Create a New Category: Cinema 4d Sky Presets Free- Download