Making gravity to apply to all rigging joints automatically

Hello,

I am trying to model a human body lying on a set of blocks that are each at different heights. I would like the body to bend according to the joints that the body has so that it is supported by the blocks in a realistic physical way. Doesn't need to look great. Unfortunately, I'm very new to how body rigging works.

My human body model has the rigging already done (I just grabbed a free model from some website). Basically, the human body model looks like a corpse. I would like to drop the body on some blocks and have the body bend according to how a real body might. Then, if I move some boxes up and down, the body should adapt to the new configuration.

What is the best way to do this? Is rigging the correct solution or is there a different Unity feature that is better for this?

Thanks for the help and Best regards!

 

I figured out that there is a ragdoll tool that is pretty close that I want to do. I just need to edit it a bit so it's a bit closer to human geometry and fix some joints so that they are constrained.