Vertically stacking panel door with improved curved track portions

A vertical door guide for a vertically stacking door, comprising:

• a first vertical door guide;
• and
• a second vertical door guide, wherein the first vertical door guide and the second vertical door guide each comprises:
• a vertical track;
• a panel interface zone comprising a first curved track portion and a second curved track portion, wherein the first curved track portion and the second curved track portion each comprises a non-simple open curve with two different curves comprising a first curved portion having a first radius of curvature and a second curved portion having a second radius of curvature that is different from the first radius of curvature;
• a first horizontal track portion coupled to the first curved track portion;
• a second horizontal track portion coupled to the second curved track portion;
• a first track bracket that provides inner surfaces for the first curved track portion and the first horizontal track portion, wherein the first track bracket further comprises:
• a first lip to form a top part of an inner track of the first horizontal track portion;
• and
• a second track bracket that provides inner surfaces for the second curved track portion and the second horizontal track portion, wherein the second track bracket further comprises:
• a second lip to form a top part of an inner track of the second horizontal track portion.