For optimal results: Use Cycles render engine. Apply Auto Fix Volume Render in the addon to optimize volumetric settings. Use high-resolution HDRIs (4K or 8K) for realistic reflections and lighting. Adjust cloud Turbulence and Thickness for natural variation.

Yes! HDRI Sky Pro includes built-in parameters for Sky Angle, Wind Strength, Turbulence, and Cloud Thickness. All of these can be keyframed in Blender to create dynamic, moving skies and weather effects.

HDR (.hdr) – smaller, lightweight format ideal for quick setup or previews. EXR (.exr) – higher precision, better for professional rendering or post-production. You can select either format directly inside the addon before downloading.

All HDRIs are downloaded directly from Poly Haven, a public domain asset library under the CC0 license. They are completely free to use for personal or commercial projects without attribution (though credit to Poly Haven is appreciated).

No. The addon is designed to save space. Only HDRI thumbnails are stored locally for browsing — full HDRI files are downloaded on demand directly from the internet when you choose one.

This usually happens if no HDRI World is applied. Use the Create HDRI World or Quick HDRI tool before adding clouds. It automatically sets up the correct world lighting and exposure for bright, natural skies.

Clouds in HDRI Sky Pro are volumetric and require the Cycles render engine to display properly. Switch to Cycles under Render Properties → Render Engine. Eevee does not support full volumetric rendering for 3D meshes.