Do this deliciously today (if your graphics card supports it):

  • Download Second Life 1.15 for the Beta Grid.
     
  • Go to Client menu > Debug Settings and from the top dropdown menu, select or type in "RenderGlow" (it will autocomplete).
     
  • Set "RenderGlow" to "TRUE" from the bottom dropdown menu.

     
  • Also in the top dropdown menu, you can change "RenderGlowResolution", "RenderGlowSize", and "RenderGlowStrength".

Observe…

This is a much more ethereal appearance than the present "flat" style. I managed to get this ample bloom by resizing my viewer window and moving it across my dual monitors. A pleasant, dreamy accident which makes SL's environments look more like some of the "commercial games" out there. What's especially appealing to me is that this is live and in realtime.

For a more meaningful before & after:

If you like this, send a happy IM to Runitai Linden, graphics guru. I think he also did the newly-generous halo around 1.15's sun.