zippedlogs.7z
When I ran Dyndolod I had a very minimal modlist installed: Address Library, Papyrus Util, Dyndolod Resources, Skyrim Realistic Overhaul, Cathedral Water, Water Mod, SMIM, Skyrim Fixes Collection, Ancient trees (textures/meshes only, no esp), Blended Roads, Realistic Aspen trees, Particle Patch Water Effects and Brightness Fix, USSEP, Wintersun, Wyrmstooth, Forgotten City (in case its relevant).
I checked every single mod and did not find any billboards. Except for Realistic Aspen Trees, but that does not affect pine trees and does not appear to have an impact on the result (I have this issue even without it).
I will copy the log and debug logs. I will try to take a better screenshot when I can play Skyrim again.
For now I've uploaded the logs in a zipped file. Here is the link to the file sharing service in addition to the files below https://ufile.io/4fhdcwwb
I do not know how to upload texgen output with the 3MB cap these forums have. Even zipped it reads 58MB. (Nevermind, figured it out, just uploaded the files for tree lods)
zippedlogs.7z
lodgen.7z