Well first off they seem like the colour area is to large for the white so if you could scale that down by as much as 1/3 I think you'd have a nicer looking start point . Or bear this in mind when selecting a new mat...we don't know what this was mapped in so we can't give more specific advice. More details = better help.. ...

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again