How to make a Particle System behave like a fluid?

So, scripting it is then? No fluid support? I'm a bit sad, all my dreams of making lava fountains won't come true. I hope in Unity 5 with the new nvidia physics there will be something of the sort.

With the settings above, you can dampen the particle on collision so the particle appears to stick to stationary objects. You can also/instead get the position of any hits, and create mesh quads with spats or other graphics at that position. So you can simulate a fluid marking a surface, but you cannot simulate the fluid itself (beyond your own script and managing the position of the particles in the particles array). Given hit positions, you could do other mesh creation or manipulation as well. So there are a range of things you can do, but you are not going to get in sort of "soft" physics unless you write it or buy it.

I see, thank you for the answer. I spent quite some time digging round to find about fluids in Unity, and it didn't seem like it had native support of this feature. I suppose the one plus is that I get to control exactly what happens via scripts.