Pattern from video: front-image top-middle → top-left → center → top-right (last frame 95). World nodes approximately: (-0.20,0), (-0.20,-0.10), (-0.10,0), (-0.20,+0.10). Pixel ray at z=.015 yields top-left (-.194,-.102), center (-.098,0), top-right (-.194,+.102). Initial stick tool (-.202,0,.0699), above starting node. Execute continuous trace at z=.015, then lift.