There is only one file type that uses the .WRZ extension:
Compressed VRML World File
3D image file written in the VRML (Virtual Reality Modeling Language) language; describes a world that can be navigated in three dimensions; saved using Gzip (.GZ) compression, and is the compressed version of a plain text .WRL file.
NOTE: Since WRZ files use Gzip compression, they can be opened with any Gzip decompression utility, such as 7-Zip, Corel WinZip, or Smith Micro StuffIt.
Updated: October 5, 2012