I've got a similar if different issue. Trying to push it to 1920x1080 and using the variables to set the aspect ratio to 16/9 and setting game width and game height to 1920x1080. I also set the room, camera, and viewport sizes to 1920x1080 (tiling the test images). The result is a black screen, is there something I'm doing wrong? Albeit, I'm very new to Gamemaker so I'm sure configuring something like this might be a bit out of my depth. Regardless, anything I'm doing wrong that could be causing this?