[FEATURE] Keyframing of Layer Blend Modes.
This idea originally came from a thread by @throndronis.
I can't think of any software that can keyframe blend modes, and, since blend modes apply last in a layer's order of operation, I don't know how feasible it is to add a keyframed parameter at that point.
However, since Blend Modes are simple arithmatic equations applied to channel values, it should be possible to keyframe between them? Maybe? Seems like this might require multi frame readout to grab the equations from both blend modes then ramp channel values, but, hey, I thought it was an interesting and unique idea.