The UVW maps are all over the place.
They may have at times painted on the model which some 3d software prior to closure already allowed and then exported a guide document after getting some registration marks on their seams.
EDIT to add: CoH models are also allowed 1 smoothing group. Faces can be in that smoothing group or out, either all the faces on the model, none or some combination in between. This then tells the renderer to smooth the edges. Without smoothing groups, you end up with something like the quartz models from the DE with hard faceted faces.
I understand smoothing groups, Mechanical objects are usually a combination of smooth and solid rendering.
of course they used exterior software, CoH is not a modelling suite lol. but yeah my question for example, is specifically to see the guide document for a sphere in the game. Is it not possible to pull the UV map from the game to see it? I understand if it's not.
in example heres the sphere I made (left) with the UV face layout(right):
I had to split the object into 2 different materials and 2 different texture sets, though the UVs were stitched together perfectly. is it possible to show a sphere from CoH with it's UV layout next to it like this? even a screenshot would be great.