Eight free panoramic HDR EXR skyboxes from the Real Skies collection (aurora, tropical midday, storm, sunsets, polar night, winter and equatorial night) with a simple URP preview scene.U3D Real Skies — 8 Sky Sampler is a free selection of eight static panoramas for trying different skies in a Unity project: an arctic aurora, tropical midday, summer storm, coastal sunset, polar night, desert sunset, winter sky and equatorial night.Open the sample scene and use the arrow buttons to cycle through the eight cubemaps while the camera slowly turns. The sample applies the selected skybox only; it does not match scene sunlight, ambient light or shadows to the image, so adjust lighting for your project.The panorama images are AI-generated and converted to estimated linear radiance. They are not measured photographic HDR captures. Land and water visible on the horizon are part of the image, not 3D geometry. Clouds and auroras are static images, not animated simulations.AI Ready. The package includes Documentation/AGENTS.md with the public SkySampler component, its cubemap and shader fields, the selection API, the sample scene and verification steps. Coding agents can inspect the eight assets, configure the viewer and test selection; the guide does not claim that an agent calibrates lighting or judges artistic quality.The full Real Skies collection (128 skies in 32 sets with day-cycle blending) is a separate product and is not included.Eight 4096 × 2048 equirectangular OpenEXR sources (RGB half-float); Unity imports them as cubemaps.Tested in Unity 6000.3.21f1 with the Universal Render Pipeline 17.3 and Unity UI on Windows. HDRP, Built-in and other platforms are not validated.One sample scene with a uGUI sky selector. The sample creates a temporary material with Unity's Skybox/Cubemap shader; no material or shader asset is shipped.Separate Assets/RealSkiesSampler root and U3D.RealSkiesSampler namespace; checked for GUID, resource and type collisions when installed beside the full Real Skies package.No automatic sunlight matching, cloud animation or time-of-day system.The eight sky panoramas were generated with AI image models. The recorded generation graphs use Z-Image Turbo with the Qwen3-4B text encoder and the 360Redmond panorama LoRA, and the images were upscaled with the NMKD Siax ESRGAN model. The images were then processed for panorama seams and horizons and converted to estimated linear HDR radiance (OpenEXR). They are not photographs or measured HDR captures.The store poster artwork was created with an OpenAI image generation tool from Unity screenshots of the package.AI coding assistants (OpenAI Codex and Claude Code) helped write the sample scripts, tools and documentation; the code was reviewed and tested in Unity 6000.3.21f1 URP.
