The graphic effects for photon grenades (the grenade, glowing trail and explosion) do not display when set to medium/recommended graphics preset settings, though the character model animates as it should. Oddly the effects display normally at low preset settings.
I'm still toying with options to try and isolate the problem, but this is not easy as that requires a lot of small separate ground combats. There seems to be a similar problem from other large explosion effects in ground combat, but I don't have much definitive information on that yet for the same reason.
Has anyone noticed similar problems? I would rather not have to downgrade my graphics settings but invisible explosions are very irritating >.<