I used poncho shelters for years but have changed to a tarp which is a bit bigger and means i have more chance of finding comfortable ground between 2 trees. But it still means I have to lower it to keep dry if the rain is coming down at an angle.

The DD Hammocks tarp comes in different sizes. The 3x3 metre one is big enough to make a centre pole tent.
I'll be getting one soon. Everything I've bought from them has been very good so far.

https://youtu.be/yMAtpWQdVbY