Origami inside-reverse fold Tutorial (Step-by-Step)

The inside reverse fold is a crucial Origami technique that allows for the final shaping and detailing of a model. By reversing a fold and concealing it within a structure, it allows you to make a more realistic 3D model.

There are two methods to the inside-reverse fold. Tucking a flap and Folding a point.

Tucking a Flap Inside

  1. Start with a rectangular sheet of paper and rotate it so that the shorter sides are horizontal.
    rectangle origami sheet in portrait orientation
  2. Fold the paper in half from top to bottom.
    rectangle origami sheet folded in half vertically
  3. Now fold the right side diagonally so that it lies in line with the bottom edge of the sheet.
    origami sheet folded in half diagonally from the right
  4. Unfold step 3.
  5. Slightly unfold the crease made in Step 2.
  6. You will notice you have three creases. A mountain fold from Step 2, a mountain fold from Step 3, and a valley fold from Step 3.
    tucking 4
    Turn the valley fold from Step 3 into a mountain fold.
    a valley fold being turned  into a mountain fold
  7. Now turn the mountain fold from step 2 into a valley fold only up to the point where the creases from Step 3 intersect.
    a valley spine being turned into a mountain fold to make an origami inside reverse fold
  8. Now simply push the valley fold from Step 7 inward until the two outer corners come together.
    tucking a flap to make an origami inside reverse fold
  9. Flatten the paper and you are done!
    origami inside reverse fold

Folding a Point

  1. Start with a Kite base.
    a yellow origami kite base
  2. Fold the kite in half along the center crease, then rotate 90 counterclockwise.
    kite base been folded in half
  3. Make a valley fold, by folding the point so that it now faces downwards.
    a origami kite folded in half with an arbitrary mountain fold
  4. Unfold step 3.
  5. Slightly unfold the kite.
  6. You will notice you have three creases. A mountain fold from Step 2, a mountain fold from Step 3, and a valley fold from Step 3.
    an origami inside reverse fold that is unfolded
    Turn the mountain fold on the inside from Step 3 into a valley fold.
    This will leave you with two valley folds on the inside.
    folding a point 6
  7. Now turn the valley fold on the spine from Step 2 into a mountain fold only up to the point where the creases from Step 3 intersect.
    folding a point 7
  8. Now simply push the valley fold from Step 7 inward until the two outer corners come together.
    folding a point 8
  9. Flatten the paper.
    folding a point 9

And that is the two methods of inside reverse folds. The next lesson is the Outside Reverse Fold, which is basically the inverse of folding a point.

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