Motion blur
动态模糊 · 拖影 · 运动模糊

What it is
Moving subjects or camera smear into motion trails.
When to use it
Speed, chaos, drunkenness, passing time.
When not to
When every frame of action must be crisp.
Often confused with
- Rack focus
Rack focus is a focus change, not motion smear.
Common generation mistakes
SymptomMotion stays perfectly crisp.
FixState clear motion trails on the fast-moving parts.