Using @jwatte equation and some tweaking of the result (multiplying and power) I was able to come up with a somewhat material LOD function. I pass the Camera FOV variable to the material via Dynamic Material Instance on my base class and set up the material instance on begin play. My sample below includes if nodes for debugging to show various levels via colors so that I could adjust the multiply and power to get the results I wanted. I plan on multiplying the end result by a fresnel, as well as using LERP nodes to adjust the “exponetIn” and “basereflectfractionin” inputs to fresnel node dynamically based on objects screen size for a highlight effect that will brighten as object gets smaller.
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Hope this helps someone else…
Screen size of mesh