The preset [.mat] files are fully compatible with both Mac or PC versions of Bryce 6, Bryce 5, Bryce 4 or Bryce 3D.
Installation instructions are included with the files.
If you do not yet have a decompression/unzipping program, you should get one soon. There are many files on the Net that you will not be able to enjoy without one.
The following programs are highly recommended: WinZip for Windows, which is shareware, or StuffIt Expander for Mac or PC ..... it's free, or 7-Zip for RAR, ARJ, LZH, TAR, GZIP formats ..... free also!