Does the entire line of iOs devices support the Apha8 texture format? All the way from original ipod/iphone/ipad to the latest models?
Yes, and they even support a LuminanceAlpha (8 bits x 2 channels) format, which Unity unfortunately does not. Why do you ask? Any problems?
Another format Unity doesn’t support is RGBA5551. The only format that iOS doesn’t support, but Unity does, is RGB @8 bits per channel. It gets expanded to RGBA 32. So if you’ve ever thought that you’ve saved memory by not using that channel, change that thinking in the future. It may still save some space from the size of the download, though.
Does Alpha8 get expanded at all on iOS, to like ARGB32, or does it stay efficient at only 1 byte per pixel on the video card?
Does anyone know about this? My hunch is things stay at Alpha8 1 byte per pixel based on what Jessy said, but I want to be sure and can’t test it myself.