Shadows don't have clear edges, kinda corrupted

I want my model to cast bold and clear shadows. In the picture, shadows are pretty much nicely casted except one thing… their borders appear distorted (like a zigzag). I tried to play with all shadow settings but nothing seems to change. What could be the problem?

Could you share this 3dm file? Thanks.

Hi @Selinay1

How big is your model? I’ve experienced this kind of issue when working with a large terrain mesh surrounding a few houses. Removing the mesh helped sharpen the shadows.

In my experience, the more detailed a project is, the lower the shadow edge quality becomes in the viewport.

It seems like Rhino tries to prioritize responsiveness when navigating the model, so shadow quality is the first thing to be sacrificed.

This can be quite unfortunate when working at a medium urban or architectural scale.