Help with modified a portrait

[harry7mason]

Hello Mugeners!

I want to ask for your help.
I try to change the portrait for Linne, because looks too small.
The character info:
author = Websta
localcoord = 420

I find this sprite 1280X713, looks very cool and try to crop it to make a new portrait. 



After a lot I find the right size could be: 156X182 pixels.


But when I upload the image the portrait looks very low res, but is very strange because is a very long image, I assume the big image does not lose resolution when becomes smaller but... I was wrong. Add capture:
 

I make a mistake?
Can I add a bigger image and reduce the size of the 9000 1 in the .CNS to don't lose the resolution?
Thanks for your help!

[NotAGoodName]

Because the character is using localcoord (~76%), you will lose quality in the scaling process.  There are some ways to mitigate this, but it requires Mugen 1.1 in OpenGL mode and a number of resolution settings.  In short, you use a very high internal resolution (a multiple of the screenpack localcoord) and scale down to your monitor's resolution.  This process does not produce perfect quality, but it's as good as possible.

[harry7mason]

Thank you very much for your response!
Sadly this is beyond my power level    but I will try to learn more about this.