Unwrapped object is not seamless?

This one is definitely a question for people that are into modeling and texturing.

Take a look at the following picture. The doorknob in this game looks really good, except for the fact that we can’t for the life of us get it to be a seamless texture.
As you can see it is cut into different colors. Is there an easy fix for this? Or a tutorial video that someone knows about that would demonstrate this? All help is much appreciated.

-Cole

P.S. We use blender as our modeling program and GIMP for bitmap.

Hi.First i could check if it is an texture compression artifact.From that texture’s import settings choose Truecolor option.
If still there is a problem you can watch this video.
How To Unwrap A UV Sphere In Blender