In iRIC ver.4, UTT (Universal Tracer Tracker) is renamed to GELATO (GEneralized LAgrangian Tracking with Optimization) along with the addition of new functions.

New features include rendering of trees and gravel, the ability to use two types of tracers (primary and secondary), GUI improvements, and more.

It can be used in version 4.X (beta version) that is currently open to the public, so please try the renamed and powered-up GELATO.