make a single texture 'immune' to the quality settings

i have a scene that contains a splash screen, with a single plane and a texture applied with a logo. but when I test a build on a lower quality setting (ie with the textures set to 'half res') the logo screen is VERY pixelated. how do i go about making that one texture, or scene immune to the changing in quality setting? i know that scene wont be affecting the speed of the game no matter how big or small that one single texture is.

thanks in advance -seth