Hi guys. I have been working in FumeFX all week trying to figure out how to reduce spacing correctly to increase realism of my fuel and fire.  The actual problem is that any change I make from the current setting located in the general tab makes the preview and rendering go away. I even tried redoing the simulation (Play key). No mater what I do any changes makes everything go away.

What do you make of this?

Did you rerun your simulation?
EDIT: Not sure why I wrote that since you mention you did.
As mentioned below, having the spacing too large renders nothing.

Max 2012
Windows 7 64 SP1

I have the same problem right now. I have never had this happen before. I want spacing higher than 1.0 so I can simulate some tests faster. But when I go higher than 1.0 and hit simulate, nothing will show up anymore. If I go back to 1.0 or lower its works fine. So for now I’m stuck making slow tests at 1.0.

this might have to do w/ the the size of your emitter. I’ve found that if the emitter size is smaller than your spacing size FumeFx simulates fast and gives you nothing. hope that helps.