I have been trying different textures such skin, meat, soil, wood, sand, water, etc… from all those, these ones are probably the ones that work the best. Between blood/wine red and black. I still could change it in the future but I want to define the assets before I build everything in AF. I prefere textures not too rich, just with a bit of detail that helps to create a reference of scale. Even though dark red is more heart/emotions related, I think the black ones could work better, specially the one shown at the bottom.