Undo texture channel fix

ios/RCTConvert+ARKit.m

@@ -310,19 +310,8 @@ + (void)setMaterialPropertyContents:(id)property material:(SCNMaterialProperty *
     if (property[@"path"]) {
         SCNMatrix4 m = SCNMatrix4Identity;
 
-        // scenekit has an issue with indexed-colour png's on some devices, so we redraw the image. See for more details: https://stackoverflow.com/questions/40058359/scenekit-some-textures-have-a-red-hue/45824190#45824190
-
-        UIImage *correctedImage;
-        UIImage *inputImage = [UIImage imageNamed:property[@"path"]];
-        CGFloat width  = inputImage.size.width;
-        CGFloat height = inputImage.size.height;
-
-        UIGraphicsBeginImageContext(inputImage.size);
-        [inputImage drawInRect:(CGRectMake(0, 0, width, height))];
-        correctedImage = UIGraphicsGetImageFromCurrentImageContext();
-        UIGraphicsEndImageContext();
-
-        material.contents = correctedImage;
+        // scenekit has an issue with indexed-colour png's on some devices, See for more details: https://stackoverflow.com/questions/40058359/scenekit-some-textures-have-a-red-hue/45824190#45824190 to fix this we could re-implement https://github.com/react-native-ar/react-native-arkit/pull/171 in a more performant way
+        material.contents = property[@"path"];
 
 
         if (property[@"wrapS"]) {

ios/components/RCTARKitSpriteView.m

@@ -22,7 +22,11 @@ @implementation RCTARKitSpriteView {
 
 - (CGAffineTransform)getTransform {
     SCNVector3 point = [[ARKit sharedInstance] projectPoint:self.position3D];
-    CGAffineTransform t = CGAffineTransformMakeTranslation(point.x, point.y);
+
+    // the sprite is behind the camera so push it off screen
+    float yTransform = point.z < 1 ? point.y : 10000;
+
+    CGAffineTransform t = CGAffineTransformMakeTranslation(point.x, yTransform);
     return t;
 }
 
@@ -40,7 +44,6 @@ - (void)renderer:(id<SCNSceneRenderer>)renderer updateAtTime:(NSTimeInterval)tim
 - (void)setTransformByProject {
     CGAffineTransform t = [self getTransform];
     [UIView beginAnimations:nil context:NULL];
-
     [UIView setAnimationDuration:self.transitionDuration];
     [self setTransform:t];
     [UIView commitAnimations];