What a half drop repeat is
Start with one tile, the repeat unit. In a block repeat, copies of it sit in straight rows and columns. In a half drop, the first column stays where it is, the second drops by half the tile’s height, the third lines up with the first again, and so on across the fabric. The drop runs along the length of the fabric, the warp direction, while the columns step across its width.
Because neighbouring motifs are never side by side at the same height, the eye follows diagonals instead of rows. That softens the structure of the print and spreads a large motif more evenly, which is why the half drop is a favourite for florals.
For the joins to disappear, the tile’s edges have to match with that shift. A motif that leaves through the bottom edge comes back in at the top, as in any repeat. A motif that leaves through the right edge comes back in at the left edge half a tile higher, which is the same as half a tile lower once the tile wraps from top to bottom.
Half drop vs block vs brick
| Block | Half drop | Brick | |
|---|---|---|---|
| What moves | Nothing | Every other column, down by half | Every other row, sideways by half |
| Motifs line up on | Rows and columns | Diagonals | Diagonals, with a horizontal rhythm |
| Grid visible | Often, with large motifs | Rarely | Rarely |
| Repeats as a block | One tile | Two tiles wide | Two tiles tall |
A brick is the same idea turned on its side: rows shift sideways instead of columns shifting down. Names vary between studios and countries, so when a brief asks for a half drop, check which way the shift should run.
When to use a half drop
- Large motifs. Big florals and medallions spread evenly instead of stacking into columns.
- Wide fabrics. On bedding, curtains and upholstery a grid shows across a large surface; a half drop keeps the eye moving.
- Wallpaper. Many wallpapers are hung as a half-drop match for the same reason, each strip offset from the last.
- Designs that should look hand-placed. A diagonal flow reads as more natural than a grid, even with a single motif.
A block is still the better choice for checks, stripes and geometrics that are meant to line up, and for small, dense motifs where the structure does not show anyway.
How to make a half drop by hand
In Photoshop, the trick is that a half drop repeats as a block once you take two tiles side by side. Build that wider rectangle and the rest follows.
- Prepare the tile. Arrange the motifs on a canvas the size of one tile. Keep them clear of the left and right edges for now; they may run over the top and bottom. Run Filter › Other › Offset with a vertical shift of half the height and Wrap Around on: the top and bottom join now sits in the middle, where you can fix it.
- Double the width. In Image › Canvas Size, make the canvas twice as wide, anchored on the left. The tile now fills the left half.
- Drop the copy. Duplicate the layer and run Offset on the copy: a horizontal shift equal to the tile’s width, a vertical shift of half its height, Wrap Around on. The right half is now the same tile, dropped by half.
- Fill the gaps. Flatten, then Offset the whole canvas sideways by half a tile’s width. The strips that were the tile’s left and right edges now run down the middle of each half: add motifs there to break up the empty lanes. Whatever you add in one strip, add again one tile’s width across and half a tile down, or the drop breaks.
- Define and test. Select all and choose Edit › Define Pattern, then fill a large canvas with it, or turn on View › Pattern Preview. Look for seams, gaps and accidental lines.
In Illustrator, choose Object › Pattern › Make and set the Tile Type to Brick by Column with an offset of half: that is a half drop. Brick by Row gives a brick, and Grid a block.
Make a half drop in MYTH
In MYTH the arrangement and the seams are handled for you.
- Bring a design. Upload one, or pick a result from your history. It does not have to be a repeat yet.
- Choose Half Drop. Run Make Seamless and pick Half Drop. MYTH makes a new tile in that repeat and keeps the original. A design that is already a block or a brick repeat can be converted the same way.
- Check it as a tile. In MYTH Edit, Preview as Tile shows the frame as a half drop, with tile size, spacing and tile lines. A3 Print Preview lays it out at real size.
- Export. Set the format, DPI and tile size in Export, with Half Drop as the repeat mode.
Starting from a prompt instead? Create Pattern in Normal mode takes Half Drop as its Repeat Mode, so the design arrives as a half drop. Pro results come as single images: send the one you like to Make Seamless.
Common mistakes
- Dropping a block tile. A tile whose edges were matched for a block shows a seam down every column once it is dropped. Make the tile for the half drop, or convert it.
- Sending the wrong rectangle. The tile is one unit; the rectangle that repeats as a block is two tiles wide. Sending one where the printer expects the other breaks the repeat.
- Leaving empty lanes. Motifs kept away from the edges leave channels running down the fabric. Fill the strips over the old edges before you finish.
- Forgetting the screen. For rotary printing, the repeat height has to fit the screen’s circumference exactly. Check it before you start, not after.
- Checking at one size only. A half drop that looks fine as a few tiles can show a diagonal stripe at full width. Preview many tiles at a reduced size, and a few at print size.