: This indicates that the file is the first segment of a multi-part RAR archive . You will need all subsequent parts (part2, part3, etc.) in the same folder to successfully extract the contents.
: This is likely the specific ID or shorthand for the asset. "HDR" typically stands for High Dynamic Range , indicating high-quality lighting or texture data used in rendering.
: Ensure you have all files in the sequence (part1, part2, etc.).
: Right-click the part1 file and use software like WinRAR or 7-Zip to "Extract Here." The program will automatically pull data from the other parts.