Just finished the latest job. I had to make a cow's heart that would look like a heart even covered with dripping blood. An actress needs to take big bites of it XD Instead of going for anatomically accurate I wanted to do a kind of caricature of a heart, exaggerate the things that make it recognizable. I did the sculpt in WED Clay, then made a food grade silicone mold in two parts and painted the fatty white and darker stripes of muscle tissue inside the mold with colored Knox gelatin. when that set up a bit I put the mold together and poured it with a mid tone red gelatin. I added some cherry jello just for some flavor. The white fatty bits are made by folding in flour to the Gel.