I have a Ti Goat Ptarmigan with the full net hood. Mine is of the late grey vintage (thankfully not purple), although I see they are now using black tops (good call)!
The fabric hood and the net hood are the exact same shape. The fabric hood sits over top of the net hood. Both zip across the chest with their own independent zippers.
You can definitely open the zippers on the fabric hood while closing the mesh zipper. This will provides 'window' of mesh that you can peak out without losing the protection of the fabric for rain spray or spin drift. But… the window will tend to fall closed unless you run a string to hold the fabric hood up off the mesh hood. I find this to be the optimal setup in wet weather, as it still ventilates well, but keeps the bugs out.
Alternately, you can fully unzip the fabric zipper and flip the fabric hood over to the bottom of the bag. This leaves a full mesh hood only, which is great for bug protection only on dry nights.