correction it uses 1 core out of 4 CPU cores i wasnt talking about GPU
CPU can be used to accelerate all the particles and physics processing, which GL chose to ignore the extra 3 cores
looking at Nova3 you can see its smooth but once you have around 3 enemies with their phsycis simluation, it lags bad, the CPU is the ideal place to deal wtih physics and ragdoll but yea, what can i say, its GL, they are spoiled and like the GPU to do all the job and not bother with multithreaded coding
I stand corrected