I am rendering a model in twinmotion and for some reason when i turn on render mode (ray tracing) my grass and pavement materials just appear as white. i am not using 3d grass, just the grass material, and two-sided geometry is checked. I used painted vegetation and that shows up, but you still see the white underneath where the grass material should be. I have messed with all the material settings and uv mapping, and nothing i find online is working. I have HDRI on as well but never had this issue. here is a photo
