Reproduction steps:
1. Open the attached project.
2. Play the 'Test Scene'.
3. Comapre left and right images.
- Left image is upscaled using image editor. Same image can be observed upscaling it in Unity Editor and using NPOT (Non Power of 2) = None.
- Right image is upscalled using NPOT = ToLarger, but toNearest and toSmaller also blurs.

Actual behavior (Screenshot attached):
- Distinguishable left and right textures.

Expected behavior:
- Less distinct differencies between textures.

Reproduced with:
5.5.4p5, 2017.3.0a7