  STAR observes a complex picture of RHIC collisions where correlation effects
of different origin -- initial state geometry, semi-hard scattering,
hadronization -- coexist. I present STAR measurements of particle number and
velocity field correlations obtained using a variety of techniques, including
direct construction, fluctuation inversion and discrete wavelet transform.
Connections between the techniques are discussed in detail. The resulting
physics picture is presented in the context of identifying the relevant degrees
of freedom and the likely equilibration mechanism.
