Changing texture resolution

[Codewalker]

I want to offer players to reduce the texture resolution (QualitySettings.masterTextureLimit) to improve performance on low-end systems. However, if all textures are rendered with half resolution this also applies to NGUI atlasses. That makes all GUIs almost unusable, they are totally blurred and font are not readable anymore.
Is there any method to exclude the NGUI atlasses from being reduced?

[ArenMook]

Change the atlases to use TexCoords instead of Pixels, and you will be able to scale them.

That said, I don't advise doing it as it will seriously degrade the look of your UI.