phong - Trenchbroom - Arghrad Revisted

[Jaeon]

My pak is about done and before I finished I revisited phong shading.  As pointed out to me in this form the directions are out there which I tried but it was giving me no joy. I did find this

"Using Phong Shading

ArghRad implements Phong shading on a per-surface basis. To use it, give the desired surface a light value, but do not set the light flag. This value acts like a "curve ID tag". When it lights that face, it will smooth together the lighting with any touching faces that share the same "ID tag" light value. Two touching surfaces can belong to two different curves simply by using different tag values."

The key is per surface.  I selected one surface (1st image) and gave it a light flag and no light value. I applied that surface's properties to each surface on that pipe bend. When the surfaces are well lit it appears blended OK but out of direct light it looks  unphonged. (2nd image)

The third image is no phong at all