Sounds like a similar issue to ours, the problem is that the small scale of the FX causes them to get clipped when camera is too close.
@ Spookyboo - If you try resizing one of your explosions or something to about 1-5% (which is appropriate to OGRE) then zoom in, you'll see what I mean. This is possibly what our esteemed colleague above means by needing to alter camera position.
I'm in midst of scripting some explosions for a vehicle combat game, got some nice oily smoke etc. Vehicles in-game are maybe 3-5 metres long so reasonable explosions start at maybe 10-15 metres across in the busy part. Things like little smoke puffs from ejected trails fade at about 50cm diameter, sparks and flames are tiny.
It is currently impossible to see these tiny components in editor, closest zoom I can get which doesn't totally clip out the FX displays the whole system at about 200 pixels wide (I can post a shot but u probably get my drift). And that's a tank explosion with extra meaty chunks. You can see how bloodsplats might be tricky
