Pools of water/mud/acid/blood/lava, piles of gore, flesh, corpses

I would like to be able to add these directly on top of the floor. Yesterday I was making a ghoul's nest, and I had to use steaks and bones to make it a bit more "gory". Plus, when making a sewers environment, I didn't had the chance to add some pools of water on the ground to make the floor more "interesting" and realistic.