Weekly Update:

Since I launched the game I started creating shaders, as I had never written shaders before, I looked for a more practical solution, and I found it, Shader Forge. This tool allows me to create Shaders in a visual way very easily and it have a wide documentation.

And so began my adventure in the world of shaders, first I wanted to make walls and floors change from one texture to another when you traveled in time, in a gradual and random way. I struggled to achieve it but in the end I did it, this is the result:

Left: new material with new shader | Right: default material

The next thing is to make water :)