Grid Terrains on Voobly are solid gray and thick.
In Light Grid Terrains, grids are black and rendered with alternating between 30%, %50 and 75% transparency over standart terrains.
So it blends better with original textures and is less disturbing while serving same fuctionality.

Ultra Light Grids NoSnow:http://www.voobly.com/gamemods/mod/657/Ultra-Light-Grid-Terrains-NoSnow
Nirvana Grids: http://www.voobly.com/gamemods/mod/514/Nirvana-Terrains
Light Grid NoSnow: http://www.voobly.com/gamemods/mod/460/Light-Grid-NoSnow
Advanced Grid: http://www.voobly.com/gamemods/mod/473/Advanced-Grid
Advanced Grid NoSnow: http://www.voobly.com/gamemods/mod/474/Advanced-Grid-NoSnow



Also if you want it out of voobly, check this thread: [You must login to view link]