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OpenEXR is an HDR standard developed by Industrial Light & Magic. OpenEXR file extension is .exr, the common OpenEXR file is FP16 (16bit Float Point, also known as half Float Point) data image file, the data type of each channel is FP16, a total of four channels 64bpp, each channel 1 bit bit is used to mark the "index", 5 bits are used to store the value of the index, 10 bits are used to store the mantissa of the chromaticity coordinates (u, v), and its dynamic range is from 6.14 × 10 ^ -5 to 6.41 × 10 ^ 4.
The FBX format of AutoDesk was originally developed by Kaydara in the 1990s for storing 2D or 3D content with motion data. Over the years, due to its 3D animation capabilities, it has evolved into a widely used format for 3D modeling applications such as Blender, 3D Studio Max, and others.
This format is used to contain 3D models, including vertices, faces, and other 3D geometric graphics, as well as animation data. The format is proprietary, but there is a publicly available API for development purposes. The file content can be either text or binary, and the Blender Foundation has worked to document the format.