> I suggest using the 'blob' object.
>
>

I tend to agree. With a blob, it will also be faster than using many 
superellipsoids in a merge.

The superellipsoid is a relatively slow primitive. When using a merge, 
once you hit the bounding box of the merge, you need to test and 
evaluate each and every components.

With a blob, there is a great deal of optimisations done, starting with 
an internal bounding hierarchy. You only evaluate the closest components.
A blob tends to produce rounder shapes.

As for the particles been to heavy, have you tryed making them lighter 
but increase the thermal inertia?
You can also increase the surface tention to compensate.
You can also decrease the heat imput proportionately to the mass.



Alain

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