How to add a white color as a filter on a SKSpriteNode in Swift

🎤 General Discussion Swift
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I have added a SKSpriteNode in the scene, and I want to add a white color on it to brighten.

let armySprite = SKSpriteNode(imageNamed: "army_img")
armySprite.position = tile.Position
scene.addChild(armySprite)
armySprite.colorBlendFactor = 1
armySprite.color = .white

However, there is nothing happened. So, how can I add a white color filter on armySprite to make it more bright?

The original img is like left one and I want it to be right one
coin

Thanks.

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