Unity Certified Associate Game Development 2025 – 400 Free Practice Questions to Pass the Exam

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Which file type is used to store Lightmap data?

JPG

PNG

EXR

Lightmap data is typically stored in the EXR (OpenEXR) file format because it supports high dynamic range (HDR) imagery, which is essential for capturing the intricate details and variations in lighting necessary for lightmaps. EXR files can store a greater range of color and brightness levels compared to standard image formats like JPG, PNG, or BMP, which is crucial for achieving realistic lighting effects in a 3D environment.

Using EXR for lightmaps allows developers to achieve finer control over the lighting information, making it possible to create detailed shadows and highlights that contribute significantly to the visual fidelity of a game. The format's ability to maintain and process data with high precision enhances the overall quality of global illumination and baked lighting solutions used in Unity.

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BMP

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