Model Quality in LumenRT

I am experiencing an issue with my model appearing to lose quality when exporting to LumenRT. What I have done is take a terrain supplied by the designer and apply surface templates, both for pavement and grass. The first picture represents what it looks like in LumenRT when completing this workflow in CONNECT Edition Update 4. As you can see, the median nose is not well defined. I tried replicating this workflow using PowerGEOPAK SS4, and things looks remarkably better when exported to LumenRT. I am using the exact same terrain and materials, so why does the LumenRT visualization look much different when exporting from SS4/CONNECT? (I prefer to use CONNECT in this case, so I can incorporate a 3mx file, which I have not been able to do in SS4.)