This is a viewer originated by forking from old Imprudence 1.3 for Aurorasim.
The newest version is forked from older singularity, so is still a V1 based viewer "with mesh support".
It supports *all* opensim build functions, has builtin AO, mesh upload and render, and is fast and once configured very stable in my testing so far.
Download here;
https://github.com/OS-Development/VW.Astra
Just download the zip file, it contains the full source code for those who like to tinker, and also has the install .exe for people like me who hate compiling C++.
Good luck and have fun.
Greybeard.