drawing the sky is not so easy. you can also draw a cube towards the map, it's that simple. but then it will look very much like a cube. I usually draw a sphere, in which you are always at the center. I use the same system in every game. try to shake it off. One is the 'sky install' and the other is located in the main cycle, which monitors the shooting. If it doesn't work, I'll help you tomorrow.
I calculated the position of the points as shown in the picture. (the nodes are the points) and I drag the image onto it.
https://i.stack.imgur.com/2tsarm.jpg
I calculated the position of the points as shown in the picture. (the nodes are the points) and I drag the image onto it.
https://i.stack.imgur.com/2tsarm.jpg