Slayers upgrade helps you make 3D games more easily. It's an extension package with lots of code already written for you so making a sweet game will be no problem! Hard stuff like vector math, quaternions, ray tracing, collision detection, or clicking on something with the mouse in 3D is a lot easier with this. There is an html help file to explain every function. Completely written in gml so it'll definitely work on any platform. With over 300 scripts, it's bound to make your life better!
Windows demo exe, demo source, and Documentation
A version that mostly works in GMS2. This is the same as 1.6.3
Fixed an issue with meshLoadGm()