HDRI skies for Lumion

  • Files are delivered as OpenEXR (.exr) for skies from HDR 142 onwards and as Radiance (.hdr) for earlier skies and all sIBL sets; the product page lists the format of each item.
  • Lumion's Real Skies effect only accepts .hdr: HDRI Hub skies up to HDR 141 and all sIBL sets load directly, .exr skies from HDR 142 onwards need a one-time conversion to .hdr.
  • 34 of the outdoor HDRIs have an unclipped sun disc for a defined cast shadow.
  • Each HDRI carries a commercial licence for one user and one workstation.
  • Prices are listed in USD.

Lumion loads a custom sky through the Real Skies effect in Photo, Movie and Panorama Mode, not in Build Mode. This page lists HDRI Hub's outdoor environments that work as Lumion skies, the exact steps to load one, and how to get a clean sun from an unclipped sky.

Products

Load an HDRI in Lumion 2026

  1. Switch to Photo Mode (or Movie or Panorama Mode).
  2. Add the Real Skies effect.
  3. Click "Select Real Sky" and then "Load custom HDR file".
  4. Browse to the .hdr file and open it; the file becomes the scene's sky, its main light source and its background texture.
  5. Use the Real Skies sliders to adjust brightness and rotation the same way you would for a built-in preset.

Try before you buy: the free HDRI samples need no account and carry the same licence as the paid files, so you can check the setup above with a real file before buying.

The effect is not available in Build Mode, only in Photo, Movie and Panorama Mode.

Format note: Lumion loads .hdr, not .exr

Lumion does not read OpenEXR files in the Real Skies effect. HDRI Hub skies up to HDR 141 and every sIBL set are delivered as Radiance .hdr and load directly. Skies from HDR 142 onwards are delivered as .exr and need a one-time conversion to .hdr before use in Lumion; Photoshop, Affinity Photo, Blender and ImageMagick all write .hdr from an .exr and keep the full dynamic range. The product page lists the delivered format of each sky. Details in .hdr or .exr. Parallax Interiors in recent Lumion versions accepts .exr, but that is a different feature.

Which resolution

Lumion's documentation does not publish a fixed pixel cap for Real Skies. For lighting and reflections only, 4096x2048 to 8192x4096 is enough. For a sky the camera sees directly, use 16000x8000 to 20000x10000 so cloud detail near the horizon stays sharp; since Lumion renders in real time, 8192x4096 to 10240x5120 is a practical working resolution for most scenes, with the largest files reserved for final still output.

Sun and shadows

Use one of HDRI Hub's 34 unclipped skies so the sun disc is intact and produces a sharp shadow edge once loaded as the Real Sky. Because the HDRI becomes the scene's main light source, no separate Lumion sun light is needed on top of it; the exterior HDR image with the horizon centred in the frame gives the most reliable result.

Frequently asked questions

Can Lumion use .exr HDRIs for Real Skies?

No. Lumion's documentation states that custom Real Skies must be .hdr. Convert an .exr sky to .hdr once, or pick a sky that HDRI Hub delivers as .hdr.

Why is there no "Load custom HDR file" in Build Mode?

Custom Real Skies are loaded in Photo, Movie or Panorama Mode. Switch modes, add the Real Skies effect and the option appears.

Do I need a separate sun?

No. The Real Sky becomes the main light. With an unclipped sky the sun disc casts a defined shadow; use the Real Skies sliders for brightness and rotation.

Which resolution works in Lumion?

8192x4096 to 10240x5120 for everyday work; the 20000x10000 files only for final stills, since they cost GPU memory in real time.

More background: which HDRI resolution you need and .hdr or .exr.