I'm creating an alien in blender, doing my best to base it on the guys from toy story. When I create the UV Map and colour it, import it back in then take a look at it in a seperate window there is alot of black segments on it. Ive tried the whole SMART UV PROJECT option aswell but I still get the same thing. What have I done wrong here?

Update: Followed advice below and can now colour without the black segments seen in the first pic, however I am now seeing lines on my alien, is this because of GIMP? (Im using GIMP to colour my guy)

