Non-Rigid Fit

/**
 * Node that performs non-rigid mesh fitting using ICP and ARAP.
 * 
 * Deforms a source mesh to match a target mesh using landmark
 * correspondences and iterative closest point algorithms.
 * 
 * Usage:
 * 1. Connect source mesh, target mesh, and landmarks
 * 2. Configure fitting parameters
 * 3. Click Apply to deform source to match target
 */