Resolved how to make a directional light that casts shadows?

i couldn't find any way to do it

 

Rather than one of us laboriously retyping the Unity Shadows documentation, why don't you start back there and methodically work through it?

If you are still unable to get it working, come back here and explain all the things listed in that documentation that you have tried.

Pay attention also to Quality Settings, as they will profoundly affect what features are enabled and how well they work.

How to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

This is the bare minimum of information to report:

- what you want
- what you tried
- what you expected to happen
- what actually happened, log output, variable values, and especially any errors you see
- links to documentation you used to cross-check your work (CRITICAL!!!)

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: https://forum.unity.com/threads/using-code-tags-properly.143875/