Thanks a lot... Amount of particles was fine.
I have it working now after upgrading to windows 10, I guess that was not the problem of course.... probably some weird user error.
Now looking for a way of rendering in Cycles4D, I guess i need the point density node for it, but although I have set it to Efx Smoke nothing shows up.
Anyone has a pointer to a walkthrough video, cannot find much on this.
Kind regards, robert