  Recent advances in time-domain astronomy have uncovered a new class of
optical transients with timescales shorter than typical supernovae and a wide
range of peak luminosities. Several subtypes have been identified within this
broad class, including Ca-rich transients, .Ia supernovae, and fast/bright
transients. We examine the predic- tions from a state-of-the-art grid of
three-dimensional simulations of dynamical white dwarf interactions in the
context of these fast optical transients. We find that for colli- sions
involving carbon-oxygen or oxygen-neon white dwarfs the peak luminosities and
durations of the light curves in our models are in good agreement with the
properties of fast/bright transients. When one of the colliding white dwarfs is
made of helium the properties of the light curves are similar to those of
Ca-rich gap transients. The model lightcurves from our white dwarf collisions
are too slow to reproduce those of .Ia SNe, and too fast to match any normal or
peculiar Type Ia supernova.
