I have landscape where only albedo and when i change angle of directional light, landspace material turns black or white.
Try adjusting the settings related to shadows, here’s a video: https://youtu.be/rAbJbKiSVt8?si=5ra_rTJERh2GD0Gr
Well, I tried and it didn’t work. I don’t think it’s shadows because when sun in zenith, it start doing that and not just in shadow.