https://i.ytimg.com/vi/GTslZWEIbjk/hqdefault.jpg
Blender Tutorial : http://www.blenderguru.com/videos/make-a-hand-grenade-explode-part-1-or-2
In Part 1 you will discover:
How to model the hand grenade
How to apply realistic textures
How light the scene using HDR lighting
source