There is no hard and fast border for this. Here more detail is seen and more colour blends as the foliage is closer to the eye.
The foreground is also calling for attention.
While some of it is behind the cabin, some creeps into the front.
You just don't want to add something you need to remove a few steps later. With confetti that's really annoying.
It's evident in the pictures the contribution confetti materials in the midground are playing in the blending of the colour blocks.
The foreground now has several colours of cheesecloth laid over and beside each other modifying the original colour of the red/brown cloth.
Time to stop.
There are two issues that will be decided tomorrow.
One is I will drop one of the panels.
The other......the cabins may be too big.