> Quote - crystal ridges are the biggest problem with quads. to get rid of this i subdivided the emsh. so i more complex mesh. so longer render times and longer simulation times.

It's worse than that. Again, because I have a scenario specifically designed to reproduce the quad problems, here I can show you them at will although you may not see them yourself in real use.

Here I'm using twice the density, 2m[20mm]Quad. Instead of reducing the crystal ridge, it's still there, but now you get the second artifact - the spiral ridge! (Look in the lower left quarter.)

You can subdivide all you want and these crystals still form.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)