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When Perspective Fails: Understand When Translation, Rotation, and Shear Are Enough
Have you ever wondered why your planar track works perfectly in one shot but wobbles in another? The secret lies in understanding motion types—and knowing when you can “get away” with less than full perspective tracking.
In this Mixing Light short, Bernd Klimm demystifies the different movement types available in planar tracking, from the basics of Translation, Rotation, and Scale (TRS) to the more complex Affine transformation, all the way to full Perspective motion. Using synthetic examples that isolate each motion type, you’ll see exactly what each tracking mode can—and can’t—handle.
“In practice, you never have such simple movement… However, you also don’t always really have full perspective movement. [Your subject is often] further away from the camera… So very often you get away with much less than full perspective [tracking].“
Bernd Klimm, VFX Artist
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