[wjko21]

even if it's not completely transparent and can not be used in a window, it could still be useful as a wall material to let some of the daylight into the house.

[andylynch]

Looks like they worked with 1-1.5 mm balsa. sheets. You could make this into plywood. Would be interesting to test this with denser timber.

[Pfhreak]

Especially since it appears to diffuse the light, which is actually desirable in some cases.