1. Draw some CONV 2. Set ctype to FIRE for example 3. Draw some particle exactly close to it (you can put the centre of your brush on CONV), for example DUST
Then some DUST should "stick" to CONV, some of them blink.
lava doesnt hold its temp very long you add one particle of freeze to a huge mass of water and it eventually freezes the whole thing so make a melt element i guess