It won&#x27;t - at least for general ray intersection itself, the deferred sorting doesn&#x27;t buy you <i>that</i> much - the main benefit it gives you is much more coherent texture accesses, which Disney needs because they use PTex which needs coherent access for the filtering.<p>Almost everyone else is still doing pretty much shade-on-hit one-at-a-time and getting pretty good performance out of it.<p>PRMan RIS is batching shading points up, but after the first bounce the batches get much smaller, so the win you get from it is much less.<p>Disney do a lot of work sorting the batches, and that takes time.<p>Also their render times for full frames are generally 12 hours wall clock or more (like most of the rest of the VFX industry). And Disney are heavily de-noising their images afterwards anyway.