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High-Dynamic Range image (High-Dynamic Range, referred to as HDR), compared to ordinary images, can provide more dynamic range and image details. According to LDR (Low-Dynamic Range) images with different exposure times, use Each exposure time corresponds to the best detail LDR image to synthesize the final HDR image, which can better reflect the visual effect in the real environment.
Draco is a glTF extension for mesh compression, an open source library developed by Google for compressing and decompressing 3D meshes to significantly reduce the size of 3D content. It compresses vertex positions, normals, colors, texture coordinates, and any other general vertex properties, increasing the efficiency and speed of transferring 3D content on the web.