Re: Texture Pack [128x] Sphax PureBDcraft [Technic 6.0.7 / Tekkit 2.0 and down]
Actually, that example you are using does not show it correctly. That is upscaling. For downscaling, there are different problems.
Let me just take your case of 4x4 and 2x2:
If you have this 4x4 image:
ZXXX
XZXX
XXZX
XXXZ
Then, depending on the scaling algorithm, you might get this:
YX
XY
An image with colors that are the averages of the bigger image, which makes the image appear blurry