There appears to be some shadow artefacts when using a dynamic directional light.
The steps I took to reproduce the issue were:
- In a new project create a level and add some flat geometry
- Add a directional light and set movement mode to dynamic.
- Set the light to a low angle near the horizon.
The shadows cast along horizontal surfaces have odd striped shadows.
With CastShadows set to false the artefacts dissappear.
I have tried tweaking the lights settings for Shadow Bias/Filter Sharpen and while this improves the issue it does not remove those artefacts.