Google Earth already helps a lot to understand the terrain (as do good maps, of course).

I cannot post the snapshots from Google Earth due to copyright limitations, but everyone can use that free program and see quite acceptable quality imagery of South Ossetia.
There were four major different terrains;
- valley without much concealment (north of the combat zones only)
- mountains without much concealment (east/west, but not very close to the combat zones
- the city and several villages
- agricultural fields
The Russian march to the combat zone offered very different conditions for potential combat than the areas where the decisive combat took place at apparently rather short ranges - and then there's again a lot of long line-of-sight agricultural terrain south of the combat zone (and where the Georgian artillery and other support were apparently exposed to Rusian air attacks).