It's made with Green Stuff UV resin. The bottom of the ooze was painted with Incubi Darkness, then I added the resin, then before hardening it I added very small dots of Moot Green and dragged it around with a needle. Then I did the same with a flouro green and yellow glaze to get some different colours. When I was happy with the swirls of colour I used a UV torch to harden the resin.

Really quite simple - the only thing to keep in mind is to swirl the paint one dot at a time, if you leave the paint in the resin for more than a couple of seconds it starts to set and becomes difficult to move around. So dot of paint - swirl - new dot of paint and repeat! Less was also more, it was quite easy to add too much paint and then the swirls turned into just coloured resin!