AddingAnExercise.md

Note: try using Visual Studio Code instead of Visual Studio for Mac, as it's easier to edit plain text files (such as shaders) in Visual Studio Code.

Follow the process below:

1. Decide on a name
2. Create a material
3. Create a shader
4. Update the shader name string within the shader file
5. Link the shader to its material
6. Add an exercise file
7. Update the readme with the exercise file
8. Update the scene file
9. Update the shader file
10. Update the exercise file