I have been working on a game lately and have little experience with photoshop. As I am doing animation of the frame in photoshop which has been fine I have all of a sudden come across a massive problem. All of a sudden when I rotate things while animating. (In this case an arm) the pixels get all messed up. In the picture you can see 4 frames. The first three I did a few weeks ago and 4th I did just now to show the effect that is happening with the pixels getting all messed up.
I have tried to change the Image interpolation but to no avail. People only post saying that isnt possible to have good pixel rotations but this is obviously not true as the first 3 frames should illustrate. I am quite certain that I have disabled something by mistake that has caused this but have too little experience to know what I have done.
Any help would be appreciated.