the .yymps file format is invalid for me. is that where the "render" object is? is there something i'm missing? can't figure out how to get this into my game.
Strange! Are you using an older version of GM? Either way there should be a vertex/fragment shader text file as well as a GML code text file that you can simple copy and paste into your game. You can also find the copy/paste code here as well! Hope that helps! :)
paste the gml code into a general script, and post the shader codes in a shader. The shader should be named 'shd_horrifi'. Then just follow the above examples for setting it up. :)