I'm pretty new to Gamemakerstudio 2 and I aspire to make something on this platform, but I'm still a novice with many parts of the program. I've heard about shaders and I know that they draw stuff through the gpu, but does the draw functions do the same or am I mistaken. Along with that, when should I be using shaders and when should I do draw events if there is an importance in its separation. Whenever I search it up, I see people say how shaders are extremely important and that they use it a lot, but I don't know if it should be used when I draw the sprite or particles or general effects. Along with that, is there any good tutorials to help learn how to use the vertex and fragment shaders and have games such as undertale relied on shaders a lot or a mix between built-in draw functions?

The questions I am asking (so it is clear):

• Difference between built in draw functoons and shader events
• What should shader events be used for
• What should shader events be passed up for compared to other option such as draw events
• Do games like Undertale use shaders a lot
  

Sorry for the jumbled English, I know that a lot of this is most likely gramatically incorrect, but it's a burning question in my mind and I don't really have the time to make sure this sounds perfect. If there's any clarification needed, just ask and I'll be sure to respond when I can. I am currently doing Shaun Spaldings programming tutorials (really does help me learn the api well) and the shader part has thrown me into a rabbit hole so I can learn how to optimize graphics well.