Pencil2D alternatives: compare timing and editable frames

For Pencil2D alternatives, use a short hand-drawn sequence with both bitmap and vector material if relevant.

• Import frames, layers, sound, and timing without flattening.
• Edit a few poses with onion skin and a tablet or mouse.
• Test playback, frame-rate changes, audio sync, and export formats.
• Reopen the native project to confirm layers and timing remain editable.
• Measure stability and backup behavior during a longer session.

A final video export can look right while the working animation is damaged. Preserve native projects until an alternative passes the reopen test.