After my earlier test I had partial success with three further M3/M4 hairs, in terms of having them work in the real-time Comic Book Preview in Poser.
Here M3 wears Boxer Hair Simple. This works and is a nice fit, though is rather retro in style. It has no textures other than near-solid black, but loading the bump map into the main texture channel gives a good blonde look. The colour of this can then be controlled by the normal diffuse colour chip. Taking the Alt Specular colour chip back to black also removes the 3D gloss.
Neftis’s fibermesh Flat Top Hair for M4 also works fine as it had a Poser .CR2, which I assume is still included in the installers along the DAZ Genesis hair? The Xavior Hair by Neftis, male and made at around the same time, look like it’s also fibre-mesh and might do something similar. His Guillaume hair is also said to be fibermesh. Perhaps the older FiberMesh stuff (produced for both Genesis 1 and Poser .CR2) is the way to go, as long as it has a Poser version?
Far more basic, here M3 wears “Slickhair” for M3 and Freak. This is the hair in the M3 “SuitPack” for Poser, now sold as Roaring 20s Gangster set for M3. This is far more “helmet hair” than M4 Hero Hair, but Commercial Use and better than nothing. It also comes with its own textures, but these are not ideal due to transparency. But applying Studio Maya’s free Monk Hair materials does something, going in the right directions and the strands are adequate with the UV scaling taken down from 1.0 to 0.5. Perhaps suitable for an old grandfather.
So neither Boxer or Slickhair are as ideal as the M4 Hero Hair, in terms of being generic and unobtrusive, but I’m pleased to find Neftis and his Flat Top and possibly a couple of his others.