Every animation in a behavior had to build its interpolation from Subtract, Multiply and Add, once per axis. The gold pickup in "Garden of Sacrifices" needed about 30 nodes for that alone. A single Lerp node with an ease makes those chains one node each. - Lerp has the inputs a (default 0), b (1) and t (0) and the output result. It sits in the data category next to Clamp. - The Ease setting offers Linear, In, Out and In-out, all quadratic. The node row shows it as "Ease: Out". - t is held in 0..1. A timer that overshoots in the last frame still lands exactly on b. Tests: - ./check.sh: 178 files, 2583 tests, CHECK EXIT 0 - 7 new cases in the node catalog test. Without the clamp on t, 2 of them fail. - e2e 6z-iii (2 checks): typing "lerp" in the palette adds a linear Lerp, and picking "Out" in the inspector reaches the node and its row. GM_STEPS=1-6: ALL PASSED, 267 checks. - README check sum is 1459, computed, not counted. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>