Definition of two 3D folds

[Gerardo]

HI,

I'm working on the definition of two 3D folds. When I have them ready, I will include pictures for the different examples. I named the "lifting fold" but, the "iris closure" was named by Philip Chapman-Bell. Would you please revise and provide feedback of both definitions?

I'm particularly unsure about the iris closure, I'm not sure if there's more than one type of that fold. If so, maybe I'm defining a particular type. I sent a message to Philip Chapman-Bell but I wanted to know other opinions while I wait for his answer

Thank you : )

LIFTING FOLD: In this fold three or four creases that share the same vertex are made, lifting two connecting walls in the
process. The paper between both walls is flattened as a tip or as a flap.

Two parallel lifting folds are made at the same time in the shovel fold, named by Wensdy Whitehead. This fold is described in her diagrams "Love You Can Bank On" (step 18). It's also a step of the traditional Masu Box.

The lifting fold would be the 3D equivalent of the rabbit ear fold, needing both low intermediate folding skills. It shouldn't be confused with the "3D rabbit ear fold" as seen in the diagrams of the Meerkat by Steven Casey (step 37) or of Noboru Miyajima's Bat diagramed by Carlos A. Furuti (step 89). Not to be confused either with the step of "opening into 3D" like in John Smith's Pureland Box.

Both walls may be of the same height or not, may be perpendicular or not, besides straight or slanted.

-walls of the same height: common box
-wall of different height: masu box
-walls that aren't perpendicular: eight sided box
-slanted walls: pyramidal box


IRIS CLOSURE: Named by Philip Chapman-Bell. It would be an overlapping succession of lifting folds. A series of boxes of equal size are creased across the paper. Each box must be divided by a diagonal crease mark between the same opposite corners. The direction of the diagonal creases is opposite to the direction of the straight creases between them (diagonal valley - straight mountain folds or vice versa). The paper is made into a roll, then the boxes are flattened and twisted following their crease marks.

If the twist fold is for high intermediate folding skills then the iris closure is for a mid intermediate skills. It's easier to fold.

One example is Spring into Action by Jeff Beynon, where a number of iris closure folds are made one next to the other.