Turn a character with drawings that switch

The character is eight drawings, one every 45 degrees, each a folder of parts: neck, body, head, ears, hair, eyes, nose and mouth. A drawing set switches every part to its drawing for the view the Slider picks, and fills the gap between views by moving or bending each part.

• Drawing substitution. Each part is a layer whose drawing changes with the control, as in cut-out animation tools.
• Parts that follow and clip. An eye can follow the head and show only inside it. Folders named after a part say so; otherwise the dialog suggests it from the pictures, and you change it.
• In-betweens only where needed. A drawing can keep the one before it for the parts it lacks, so you draw extra views only of the parts whose outline changes.
• Checked first. Drawings must share a canvas size, and colours that drift from the first drawing are flagged.

• Slide. A part moves towards where it sits in the next drawing, half before the switch and half after, along with the part it follows.
• Bend into the next. A part whose outline changes too much to slide is shape-tweened from one outline to the other, its ink line kept the same width.
• Switch in place. The part simply changes at the switch.
• Your call, per switch. The rules choose for each part and each switch; Properties shows the choice and lets you pick another, rebuilt in one undo step.
• No ghosts. Parts never fade: a part the next drawing lacks tucks behind the part it follows and goes at the switch.

The Slider's value picks the drawing, each taking over halfway between whole values. Ease and hold its keyframes in the Graph Editor: a turn that holds each view and moves quickly between them reads like a cartoon, a steady one like a turntable. The post below shows the difference.

Replacement swaps an image or video layer's source by a control, from thresholds you set. Pose Driver lets one number control move many properties through poses you record, with linear, smooth or hold steps between them, the way a smart bone or a parameter does. One control can drive both, for a mouth that changes shape while the jaw drops.