Minecraft-like shadow shader

Hello

I was making a minecraft-like game with isometric camera and I couldn't develop a shadow to help maintain the sense of depth.

my idea was to get a result similar to minecraft itself, as you can see in the screenshot below:



my main idea was to put a shader in a polygon (like a cylinder) and make the region of the terrain that was in contact with it present a slight shading, but I was not successful

anyone can pls help me?

 

Hi you can use orthographic projection