do beating heart / organs created through animation or customized shaders? any references or tutorial that I can refer to?
This is definitely going to be something you want to animate. There’s no ‘tutorials’ on how to animate organs as that’s rather specific, but you can find a collection of general animating tutorials as well as medical animations to show you how they are supposed to look. Here’s a cool video I found that has some animations of the body, there’s plenty others in youtube or google.
If you’re new to animating, you’ll have to get a 3d modeling program like blender, maya, 3dmax, and create the animation in there.