I import some other shaders provided by this link below
That people have the same problem as mine, and i dont knot what to do with those 2 others shaders. need some help here.
Props folder are fine, but polygon and simple still with shader problem
The shaders are replacements for the original shaders used in the materials that are still purple.
- Open the SM_Buildings_Block prefab
- Scroll to the bottom of the inspector, and you’ll find a section marked with Material and the name of the material.
- Expand this, and change the shader from the existing shader to one of the shaders that you downloaded.