You are right Paul about that "wall of hair" look, that's what i get with my right partial temple flap. It's difficult to recreate the low density going to higher density near the ears, even when you cut it from an old piece, you need to do it well regarding the size, shape, hair direction.

At first i was using SMH (concealer) at the temple flaps area, but it's very obvious as there's a difference between the normal hair and the powder sticking with spray, like a painted look.