http://www.cs.washington.edu/homes/certain/viewmod.html
application/x-mramesh mrh
application/x-mramesh-linear mrl
If you are on a machine that supports texture mapping, add these lines to your personal mailcap file (usually ~/.mailcap):
application/x-mramesh; MRAViewer.const -T %s
application/x-mramesh-linear; MRAViewer.linear %s
Otherwise, add these lines:
application/x-mramesh; MRAViewer.const %s
application/x-mramesh-linear; MRAViewer.linear %s
You're ready.