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In this advanced Fusion 20 tutorial, you will learn a full 3D re-projection paint-out workflow by removing a tattoo from moving footage, then replacing it with a new tattoo that sticks, wraps, and picks up real lighting. The workflow starts with Magic Mask roto to isolate the leg, then uses that matte to drive a Camera Tracker focused only on usable features. From the track, you will clean stray points, export a point cloud, and convert that 3D data into a usable UV/position map that generates geometry via displacement. From there, you will project the original footage onto the mesh to create a stabilized “working canvas,” export key stills, and do the paint-out in Affinity (free options covered). You will build two paint-out passes (light and shadow) and composite them back together with animated masking, then reintroduce realism with film grain. Finally, you will create a flexible setup for adding and blending any replacement tattoo using luma-driven interaction, subtle blur, and color adjustments, then render out cleanly to ProRes.