Document the format of the resolution property

[rulatir]

Is it an array of numbers representing width and height? An object with width and height properties? A string like "1024x768"? What exactly does it mean if only one size is specified (since the default is said to be simply 256)?

[rulatir]

Misunderstood the description in the table, apparently it's just an integer and the texture is always square. But must it be a power of 2, or can it have any size?

[sirxemic]

That's a good point, it can be anything, but to make it work on most devices, it should be a power of 2 and not bigger than 2048.