Issues with odd shadows on workshop item

I am trying to upload a bit of custom land for a condo and it has very odd shadows in some areas, regardless of how i set the suns angle or time of day. Tried recalculating normals and shade smooth in Blender before uploading. Vert count is around 2k. Any suggestions to fix this? Thank you

Are you scaling the model up/down substantially in the workshop editor? AFAIK, lighting calculations are done based on size on import, so scaling items a significant amount in-editor can result in artifacts.

This is at its base 1.0 size. It is a rather large model though. Perhaps importing it at a smaller size could help then?