PXR24

PXR24 is a pixel data format associated with Pixar and used in some image and rendering pipelines to store color data. The name indicates a 24-bit per-pixel representation and is commonly understood as three 8-bit color channels (red, green, and blue) arranged in a single, interleaved RGB triplet. PXR24 is a non-floating-point storage format, relying on fixed-width integer samples rather than per-channel floating point values.

In practice, PXR24 stores 3 bytes per pixel, one for each color channel, with no alpha channel by default. The data layout is typically RGB order, and the exact endianness can depend on the file format or API emitting the data. Because the format uses 8 bits per channel, it offers lower dynamic range and precision compared with 16-bit per channel (half) or 32-bit per channel (float) representations, but it can be more space-efficient and widely supported by older hardware and software.

PXR24 is not a color space or a color management standard itself; it is a storage format. How the stored values map to color in a final image depends on the surrounding workflow and metadata, including any gamma correction, linearization, or color space tagging applied during or after storage. In modern pipelines, PXR24 might be encountered in legacy or specific Pixar-related tools and can appear in conjunction with formats such as OpenEXR or TIFF, where it represents a compact, 8-bit-per-channel RGB image.

Related concepts include RGB24 or RGB8 formats and higher-precision alternatives such as 16-bit or 32-bit per channel representations (e.g., half or float).