A very late good morning, everyone 
OK - pink and fluffy? No, not yet… I’ve been trying to explore the ways of texturing in ZB. Usually, I like to use a lot of procedurals in shading, instead of painted maps. So, what I’ve tried is if I can make the same kind of workflow within ZB… with very small luck so far.
Here’s a test with using noise for the lung texture, no painting at all so far - I will continue with painting the diffusion while maintaning the noisebump to see how it works. In the end I will probably have to paint in the bumps directly in the geometry. Also, here’s the first steps for the bronks, which I make as a separate object.
The geometry for the lungs was also started as ZSpheres - it would probably be better to start them with polys, but what the heck - I need to learn, right? 

but, seems to me that you are in right direction how a lung looks like… 


… just kidding.

