// Build your cache key to be unique per your layer confiruation
NSString *cacheKey = @"some-key";

// Get the image from SYCompositor
UIImage *image = [SYCompositor imageWithKey:cacheKey];

// If the image is `nil`, you should build it
if (image == nil) {
	// Create your layers. See `SYCompositor.h` for a full list of available keys
	NSArray *layers = [[NSArray alloc] initWithObjects:
					   // Lens
					   [NSDictionary dictionaryWithObjectsAndKeys:
						@"lens.png", kSYCompositorImageNameKey,
						[NSValue valueWithCGRect:CGRectMake(88.0f, 275.0f, 138.0f, 138.0f)], kSYCompositorRectKey,
						nil],

					   // Body layer
					   [NSDictionary dictionaryWithObjectsAndKeys:
						@"camera-body.png", kSYCompositorMaskImageNameKey,
						bodyColor, kSYCompositorColorKey,
						nil],

					   // Shadows layer
					   [NSDictionary dictionaryWithObjectsAndKeys:
						@"camera-shadows.png", kSYCompositorImageNameKey,
						@"Multiply", kSYCompositorModeKey,
						nil],
					   nil];

	// Create the image. This will store it in the cache automatically.
	image = [SYCompositor imageWithLayers:layers size:[[UIScreen mainScreen] bounds].size key:cacheKey];
}

// Now `image` is ready to go!
someImageView.image = image;