I have an sprite with a series of frames. At some point the sprite animation sequence is reversed and restarted from the beginning. I already have the "rewind" functionality working. The sprite_index is incrementally decreased rapidly until reaching zero. I'm now looking to visually distort the sprite, like when rewinding a VHS tape. I'm looking for suggestions on how to achieve this effect. Can this be accomplished with shaders? I have never used shaders before, but this might be a great opportunity. All comments welcome.