Hi again,

> > Sorry, but i think this is not quite right. Also in liquids convection
> > occures. If you put some color small particles into an liquid you can
> > see it, i.e. Put some cold milk into hot coffee, but be very carefully:
> 
> They are only called atmospheric particles, there is nothing stopping
> you from using them in liquids. However, I will probably add a liquid
> particle type as well, which will also do convection, as well as other
> liquid behaviors...or eliminate different particle types altogether.

I did't meant my posting that you can't use the  particles for liquids,
but I got the impression that Rune had the limiting view that the
convection stuff is only relevant for atmospheric effects (i.e. density
of air). I meant my posting as a clarification for him that convection
phenomens also exist for liquids and therfore are more global, so that
it is worth of taking them into account and the work to impement them.
No criticism to your (and any other) person meant. Sorry if it sounded
like it but I'm not native english and soforth not so firm in writing
english. 

> > However one problem is there with water as liquid, as water has highest
> > density at 4 degrees Celsius (sorry I don't know the degrees of
> > Farenheit): That is also colder water will rise! (The cause why you find
> > in winter unfrozen water at the bottom of lakes, and the water will
> > freese from the top of the lakes. Additional to the fact that ice is
> > lighter water, the freezing process really begins the water surface)
> 
> I am aware of this, but I do not plan to simulate this effect, since it
> happens to few liquids besides water and will be irrelevant 99.9999% of
> the times the particle_system patch is used.

Like above, I tried to clarify that taking water as an example is not an
so ideal choice: Like you said it is a very specific property of a few
liquids. It would be nice if it could be simulated, but I don't think it
is worth the work to implement this very specific effect.

Besides this: thanks to you and all the other people which implement all
these great stuff in general

Yours 

Axel

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