Add poles (props, barriers, or item images) on either side of the path. I would use wooden poles for more rustic gates, metal ones for modern entrances and corn stalks (empty) for floral gates, like this:
Third, add a top of your choice on the top layer.
For this these gates I designed, I used a combination of item images sentries, and props!!! I would use a main prop or something to connect the entire top part of the entrance together. In my fall one, it’s the pumpkin. In the winter one it’s the wooden log. In the spring one its the bush! In the summer one its the starfish. .
This is a nice guide but I agree with @G-Code549 because there really are no instructions and it is mad short. But I couldn’t find any guides like this.
I have some constructive criticism too. The terrain that makes up the pathway matches well, but must be mixed with some circular or non-blockular terrain on the side to make it look less… cut-off. Oh and if you don’t like that — put the poles on the very edge of the pathway to avoid the cut-off look. Also, to make this guide better, add multiple different entrances.