which spectral neutrino transport is solved with different levels of sophistication (e.g., @buras06 [@marek; @bernhard12; @bernhard13; @bruenn13; @suwa10; @suwa11; @suwa13], @janka12 for a review). This success is, however, accompanying new questions. Among them[^1], three-dimensional (3D) effects on the neutrino-driven mechanism are attracting a paramount attention (e.g., @burrows13 [@kotake12] for a review). Unfortunately, however, experimental 3D models that employed a light-bulb scheme (e.g., @murphy08), have provided divergent results so far. The basic result of @nordhaus who were the first to point out that 3D leads to easier explosions than 2D, has been supported by the follow-up studies [@burrows12; @dolence12], but not by @hanke12 [@couch13]. On top of the urgent task to make a detailed comparison between these idealized models, self-consistent 3D simulations should be done in order to have the final word on the 3D effects.

At present, 3D CCSN simulations including spectral neutrino transport are only few [@hanke13; @takiwaki12]. Very recently, @hanke13 succeeded in performing 3D simulations with detailed neutrino transport for a 27 $M_{\sun}$ star. In addition to the first discovery regarding the violent SASI activity in self-consistent 3D models, their results illuminate the importance to go beyond the prevalent light-bulb scheme, only by doing so, the non-linear couplings 