I'm not sure about it.
On the one hand, the one we have is polygonal. But on the other hand, I think the HUD was a bit rushed . For example, some of the filenames refer the position of the elements on FS1 (there are some unused files on sparky_hi_fs2.vp from the FS1 HUD). On the tables, some element names are inverted. Also, there was no attempt to use dithering to smooth the gradients.
I don't know, maybe the tools they had were not really good. Maybe we're just too used to the old style.