For reference. Im going to post a bunch of Links to Shader resources or example posts ect.
So i can or others can just link to this post when someone asks about getting started with shaders.
Feel free to add to this if you want, just make sure you test it first to make sure it works.
You should of already read or browsed this (_adding_content.html). If you want to add a new pixel shader to monogame from scratch particularly if you have never before added a … new item > of type effect. (using_mgcb_editor.html). By using the content pipeline tool after creating a new MonoGame project. With that out of the way.
If any of the above is confusing apos made a alternate getting started tutorial found here.
Apos basics for getting started with monogame.
I suggest getting a single example shader up and running once your able to add and edit a shader as described above the below is a dead simple shader.
Writing your own 2d pixel shader in monogame for absolute beginners
Then to start looking thru other shaders in the list of links.
I posted a second example ( copy pastable ) as well at the bottom of the write your own first shader topic.
Though you will need to create a new game project a effect and then copy in the shown code and possibly change the namespace to your projects namespace and the game name in program.cs that should be obvious but in case its not.