I downloaded SceneGate_1_0_0_40858_x86_64, unpacked it, and ran install.sh. The README-linux.txt file says “Run ./scenegate from the installation directory to start“. It installed the viewer in ~/alchemy-install, so I did a cd to that directory and ran ./scenegate. The program immediately crashed with this error message:
$ ./scenegate 64-bit Linux detected. Running from /home/steve/.alchemy-install which: no kde-config in (/home/steve/.local/bin:/home/steve/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin) which: no kde4-config in (/home/steve/.local/bin:/home/steve/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin) - Installing menu entries in /home/steve/.local/share/applications bin/do-not-directly-run-scenegate-bin: symbol lookup error: /lib64/libharfbuzz.so.0: undefined symbol: FT_Done_MM_Var *** Bad shutdown ($LL_RUN_ERR). ***
Fedora is a GNOME based desktop but I do have a few other KDE apps installed and they run normally with no problems. I use other OpenSimulator viewers with no problems as well.
Also, I noted that the error dump says it installed menu entries but no menu entries appeared in the desktop apps menu.
It would be nice if you could provide the Linux viewer with normal Linux distro packaging to simplify installation and dependencies (e.g. an RPM file for Fedora/RHEL/CentOS and a deb file for Debian/Ubuntu).