This is a glitch i've discovered in the Doom 3 BFG Edition for PS3 (and possibly PC and 360) that causes the blood spatter effect on the floors and walls to cease working. Making the battles a lot less visceral looking.
It seems when you start the game from a fresh boot (as in from the XMB (or xbox dashboard) the blood spatter effect stains the walls and floor just fine. However, the moment you reload a saved game, the blood effect disappears completely until you reset your whole system and start over.
Here is the video proof of this glitch which I performed myself.
http://www.youtube.com/watch?v=SsS-9Id2HpI
This is an obvious glitch and not intentional so I really urge Bethesda and Id Software to patch this so we get the full experience with all the blood as intended. Thank you!