Keyframe quantization and sub-frame editing with Snap Keys

- [Instructor] When moving or scaling key frames … in an animation, we need to pay special attention … to whether or not we're snapping to whole frames. … I've got a simple animation here of just a bouncing ball. … Play that through, and we can see that the ball … is actually contacting the ground on certain frames. … I'll stop that and select the helper object on which … the animation keys are placed, and we can see those keys … all light up in white, they're selected by default. … I'll click in the timeline to deselect those, … and we can see they're in red, … meaning that they are position keys. … If I go to frame 15 in my timeline, we can see … that the ball is touching the ground on frame 15, … and that's because that key frame … is actually on frame 15 exactly. … But 3ds Max allows us to place key frames in between frames, … and sometimes we actually need to do that. … Here though, if key frames were in between frames … we wouldn't see this contact point on the screen at all … and it would look kind of strange. …