Shadows look wonky on mountain

I’m trying to build a scene with a ruin-like structure on the side of a mountain in the middle of an ocean. The lightmaps for the ruin seem fine, but any shadows on the mountain look warped. I’ve tried every which way to build the lightmap for the mountain, but nothing seems to work. I’m pretty new at this so I’m sure there’s something I’m doing wrong. I built the mountain model from a plane in blender. I’ll post a picture of the problem. Let me know what other information I should post up here. I really want to make this work.

Nevermind. Lightmap resolution was just too low -_-