# Applying Shaders to a Sprite Write custom GLSL code that modifies the look of your sprite. ## Discussion You can use the [`shader`](/documentation/SpriteKit/SKSpriteNode/shader) property of a sprite node to change the appearance of a texture with a custom OpenGL ES fragment shader embedded within a [`SKShader`](/documentation/SpriteKit/SKShader) object. Custom shaders offer almost limitless possibilities, from adding blurs and color treatments to textures to generating imagery such as random noise. The following code shows a small custom shader which inverts the color of a texture while leaving the alpha or transparency unaffected: ```swift let negativeShader = SKShader(source: "void main() { " + " gl_FragColor = vec4(1.0 - SKDefaultShading().rgb, SKDefaultShading().a); " + "}") rocket.shader = negativeShader ``` The following figure illustrates the effect of the shader. The original image, on the left, has its colors inverted by the shader:  --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)