How to Correct Collision Masks in GameMaker Studio - YouTube
How To Use Collision Masks In GameMaker | GameMaker
GameMaker Position and Motion Tutorial - csanyk.com
Unity - Manual: Layer-based collision detection
Guide to develop low resolution 2D platformers with smooth movement and pixel perfect collisions in GameMaker Studio 2 (with slopes) ⋆ Nikles dabbling in Game Dev
Game Maker Studio: Collision Masks [Platformer] - YouTube
Object Events
Masks tutorial - Simon's Game Maker website
platformer tilemap-based collision help : r/gamemaker
2D Game Maker Walkthrough tutorial by Liam Oven
Game Maker Studio 2 - How and Why to Use Custom Collision Masks - YouTube