I need to create embrossed pattern but i don’t know how to. Does anybody can explain or show example?
You can try implementing normalmap for fake embossed effect on the surface.
This is a great tool for those normal maps. I use it a lot: http://cpetry.github.io/NormalMap-Online/
Could you explai more about it?
Here is an explanation of what Normal Map are and how they behave.
Here, you can find the implementation.
I would recommend you to go through the documentations of threejs before you start creating you WebGL Application. Follow the example and try to see the work flow of implementations of various features.
It will help you in long run when you start creating your application.