HDRI, or High Dynamic Range Imaging, refers to an environment map utilized in computer graphics and 3D rendering to mimic realistic lighting conditions. Unlike standard images that use 8 bits per channel for red, green, and blue (totaling 24 bits), HDRI images often use a greater bit depth, typically 32 bits per channel or more. This higher bit depth allows for a broader range of values, capturing a more comprehensive range of brightness levels. Below is an image illustrating how a 3D scene appears with an added environment.

Or when the environment is absent

How does it work?

In 3D rendering, an HDRI environment typically refers to a 360-degree image representing real-world lighting conditions. This image illuminates 3D scenes, offering realistic lighting and reflections. The high dynamic range information in the image mimics how light interacts with surfaces, capturing the subtle variations in brightness and color found in real-world lighting scenarios. The environment can either be used solely for lighting effects or set as a background, as demonstrated in the settings below.

How do you add a HDRI environment to a 3D scene?

You can add a HDRI environment to a 3D scene through two methods: using a preset environment or importing your own HDR/EXR files.

1. In the scene section of the right-side inspector panel, click the swatch button next to the "environment" feature.
2. A pop-up will appear, where you can choose a preset environment and apply it by clicking on it. Alternatively, you can click the "Upload HDR/EXR" button.
3. If you select "Upload HDR/EXR", the asset library will open. Click the upload button in the top right corner to upload a HDR/EXR file.
4. After the file is uploaded, click on it in the asset library to apply it to the 3D scene.

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👉 Want to learn about background colors?

Background Color