I imported a model from the DS game Phantom Hourglass. The eye textures are not transparent, as you can see below. They show as transparent (i.e. with a checkered background) on the UV editor. I've set them to alpha blend as you can see in the image, and they haven't become transparent. Am I missing a setting or something? I recall doing this with this exact model sometime last year and it worked. (that old file has since been lost)
UPDATE: This was referred to another question that supposedly could fix this issue simply by unchecking "Show Backface." Unfortunately, that changes nothing in my case.