Thanks for the replies. The wiki page got me to understand a lot more about LoD. I am still confused, though, about how LI is computed relative to total number of triangles, LoD (whether auto, manual, or with simpler models), absolute size, .... For example this model I pulled off a public domain website has about 68K triangles, it LI, as you can see is sky high at 116, but LoD are all 14. And the model does not change in appearance as the cam moves away. So, it seems, in this instance, LoD just doesn't work as advertised.
I would appreciate pointers or advice on how LI is computed and the contribution of LoD to LI.
Thanks,
G