How do I fix my terrain, its too reflective/plastic?

My terrain looks like plastic, i dont know why, its super reflective after i updated unity! I have the pictures attached of what i’m seeing, can someone help me resolve this issue? Thanks!

Your textures need to have a specular map on them. It is in the alpha channel. You can try to check alpha from grayscale on your textures to make it not plastics on most textures.

I had this same issue (after updating to 5.5) and Hanoble had the answer. I went to the Terrain settings and changed the material to “Built in Legacy Diffuse” and the reflectivity went away.