[More quality for my pics?]

Yeah, it work not bad, but my paint.net have a lag while i do the pic..

Nobody know that exist a plugin or similiar thing?

[More quality for my pics?]

no... you don't understand...

I want do a image whit more quality, NOT a bigger image.

 

Look at my background of youtube..  

http://www.youtube.com/user/SenzaCanale

 

Then, look this background
http://www.youtube.com/user/UKFDubstep

 

The quality is bigger in the second background.. i want do a image whit same quality, using paint.net

 

Is this impossible? 

[More quality for my pics?]

Hi, I don't know english very well, then please don't use slang/abbreviations

 

This is my question:

How i can do a image whit more pixel/cm?

 

If i change in "adjustments" the number of pixel/cm, nothing change 

 

I want do a background for my youtube channel:

http://www.youtube.com/user/SenzaCanale

 

I want do it more similiar at a background that was do whit photoshop (whitnot use photoshop  )

 

Who can help me?
There's a metod to do an image whit more resolution?

You use a plugin?

 

Thanks a lot for the people that respond at my question