ios - Can i use images.xcassets at 3x only? -

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i'm working on universal game app swift , spritekit. i'm using images.xcassets background , images in project.

and have question.

can add image @ 3x (2208px x 1536px) becuase images.xcassets automatically resize image 2x , 1x ? want know between add image size 1x,2x,3x , add image @ 3x only on performance or problems.

some case iphone 6 use 2x (images.xcassets automatically resize 3x) slower use 2x

this artwork resolution http://i.stack.imgur.com/5fdrl.png

i'm sorry bad english. thank you

there quite few tools out there helping out generating asset catalogs. google seems favour one:

https://itunes.apple.com/us/app/asset-catalog-creator-app/id809625456?mt=12

if don´t scaling resources, possible add vector assets using pdf. rendered during build time:

http://martiancraft.com/blog/2014/09/vector-images-xcode6/


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