Raytracing uses an algorithm that is characterized as 'Embarrasingly Parallel'
Furthermore, the Cell SPEs happen to be very well-suited to the math required for Ray Tracing.
When you put 1 and 2 together, you get a situation where in certain instances, ray tracing can be much (computationally) cheaper on the PS3 than on other systems.
Keep in mind though; it is still VERY expensive computationally. It is likely only viable even on the PS3 if you need less computation for the main game, to the point of being able to give up several of the SPEs; if you want to use Ray Tracing, you would likely need to use the majority of the SPEs to do it, leaving them unable to be used for other parts of the game (which may not be necessary to begin with, but some devs have used them for generic computation, so depending on the game it may not be possible)
Please, PLEASE do NOT feed the trolls.
fksumot tag: "Sheik had to become a man to be useful. Or less useful. Might depend if you're bi."
--Predictions--
1) WiiFit will outsell the pokemans.
Current Status: 2009.01.10 70k till PKMN Yellow (Passed: Emerald, Crystal, FR/LG)
