When you’re adjusting the interpolation of two keyframes, with one being the beginning of an effect animation, and the other being stretched to the end of the clip as the end of the effect animation, does the setting you use for that last keyframe actually have an effect on the interpolation of the effect?
Like, say I have two effect animation keyframes, with the first one being set to “slow” and the second one being set to “fast”. Will the effect animation go from slow to fast in its interpolation, if the second keyframe is at the end of the clip, or does the interpolation setting only affect what goes after that keyframe?
I’m worried I’ve been laboring under the false assumption that progress between two keyframes with different settings is automatically phased from the first one to the next, rather than the keyframe setting only applying to what goes after that keyframe.
By default no, the interpolation of the 2nd keyframe does not affect the values before it.
When you have only 2 keyframes only the setting of the first one matters.
If these keyframes are for an Effect you can switch from Lanes to Curves (see image). This will give you the best visualization for interpolation. Plus if you change the interpolation to “Bezier Curve” you will have max control over the curve.
“Bézier curve (locked tangents)” or “Bézier curve (split tangents)” – found at the bottom of the list when you try to change interpolation. Set the first keyframe to bezier and you’ll have those handles to edit the curve manually as seen in my original image.