Automatic config on this one. If you want more freedom in the settings go to Experiment 2. No, I did not use Griffpatch's tutorial. I hate tutorials. I decided to try and make my own 3D game. However... I have no idea how to make this first-person.
UPDATE ON EXPERIMENT 3: I added a new object called 'box' that has its own texture. You can add or remove boxes in the "boxes" sprite's costume. The textures are still very limited (only horizontal) so my next step will be to add more objects and texture them more. After that, I plan to make jumping possible- which will be much harder. Wish me luck! UPDATE ON EXPERIMENT 2: I changed it to render first-person and added a bunch of parameters. I also added rectangular filling (draws multiple lines instead of one) so we can use a low-quality raycast and it fills in the empty spots.