Always use Textures(for 3D only) in the power of Two(POT).
Because PVRTC only compress an image if it is in POT.
RGBA images are not compressed in iOS and they are saved without compressing. So it is preferable to use textures in the POT if it is texture of 3D model.
2D games shouldn't use compression at all, as the compression mess up with the alpha, which will cause semi transparent areas to look horrible.
To make 2D sprites, RGBA 32 Bit or 16 Bit texture is preferable for best graphics quality.
RGBA images are not compressed in iOS and they are saved without compressing. So it is preferable to use textures in the POT if it is texture of 3D model.
2D games shouldn't use compression at all, as the compression mess up with the alpha, which will cause semi transparent areas to look horrible.
To make 2D sprites, RGBA 32 Bit or 16 Bit texture is preferable for best graphics quality.
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