Always render finest LOD in capture mode.
Always render finest LOD in capture mode.

We might eventually consider adding an optional argument or
similar to allow "capturesingle" etc. to specify an exact LOD.
Until then, for the most part one always wants the highest quality
renderings.

git-svn-id: 83c4c97093aeea62ac982fbfd516bf9db27f5c99@1445 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok