sprite kit - iOS SKSpriteKit - Flickering Caused by SKLightNode -

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i using sklightnode cast shadows in gamescene. adding sprites dynamically, should cast shadows. working fine, when added sprite first 'appears' in scene, entire scene scales 50% single frame, , returns normal size. creates flickering effect invasive overlooked. happens on simulator, , on physical devices - both ipad , iphone.

has else had problem, , if so, there way prevent happening?

thanks.


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