The addition of polymer to a dispersion of vesicles can result in the formation of space spanning depletion gels. However, the density mismatch between the vesicles and the polymer solution results in a gravitational stress that leads to the collapse (or compression) of the gels. We have created kinetic phase diagrams in which the rate of collapse was measured as a function of volume fraction of vesicles, polymer concentration and particle-polymer asymmetry. At short times, the rate of collapse is framed in terms of the linear poroelasticity which balances viscous, elastic and gravitational forces on the gel structure. Many of these gels, however, exhibit a curious “cracking” behavior in which the gel structure fractures into layers, changing the paradigm altogether.