Tagged: half-square triangles

Sunday sketch #327

I’ve been reusing many of the same elements in recent designs – I seem to be stuck on semi-circles at the moment (think Sunday sketches #314 and #317). Expect to see them for the next few weeks, as this week’s Sunday sketch led to a whole series of related designs. But I’m getting ahead of myself. Here’s where it started:

So it should be fairly easy to see what the block is here – a sort of four-patch with two diagonally facing (‘kitty corner’ for you US folks) half-square triangles, and two diagonally facing semi-circles. Rotating the blocks creates nice curvy pinwheels alternating with quarter-square triangle units on point.

Rotating the blocks again can create an entirely new design – quite a wacky one, but I like it! My choice of colours here also helps create that transparency effect.

Taking away the half-square triangles changes the look once again. I don’t love either of these next two designs – I feel like the checkerboard background obscures the curves. But it’s always fun to play, even if the outcome isn’t what I expected.

Speaking of playing, I kept going with these shapes, so I’ll show you the iterations in the coming weeks.

This week’s designs could be made into quilts using half-square triangles and half-circles (or two drunkard’s path units or quarter-circles). It’s a block-based design with a limited palette, so lots of chain-piecing of similar units. I always say that! 🙂


Sunday sketch #325

This design is a little like last week’s – check out those bow-ties hiding in the middle – and even a bit like Sunday sketch #314. It’s got the same vertical lines and those large half-square triangles creating diagonal lines.

I’ve coloured the shapes in a plaid-ish way, but that still leaves lots of room for variation. Changing up the colours also affects what secondary shapes emerge – although I see large diamonds in most of these designs.


This next version demonstrates the Bezold effect – the name of which I didn’t know until quilter Carolina Oneto commented on a recent Instagram post of mine. I guess it’s an effect I use often!

And here’s a different colourway. I realise as I look at this one that there’s a slight mistake in my colouring – can you see it? I didn’t colour the hot orange shapes in the same way as the others; I’ve missed filling in the small HSTs at the very tips of the shapes. I made the same mistake in the first version, too. Ah well!

This week’s designs could be made into quilts using large and small HSTs, plus small squares (next to the small HSTs). As there’s a limited palette and repeated shapes, it would suit chain-piecing (as well as methods that make more than one HST at a time).

Sunday sketch #323

I’ve done a bunch of designs where the negative space and positive space use the exact same shapes (in recent months, Sunday sketches #276, #279, #286, #296, #315, #316….). I guess it’s like a two-colour tessellation?

I like the reverse colourway too.

I tried a different layout, taking advantage of the sharp angles of the half-rectangle triangles. I like the idea of two-tone quilts that start with one colour and end with another – I’ve used that effect a few times before, like with Sunday sketches #285 and #123 (which coincidentally use the same light pink and black colour palette).

I’m not sure this one really works; I’d prefer that those top-left and bottom-right diagonal lines extended to the quilt corners without that small vertical interruption. I could fix it… but it would take a bit of time in Electric Quilt 8, and I couldn’t be bothered 🙂

This design uses 3:1 half-rectangle triangles (which are 3 times longer than they are wide) and half-square triangles. Plus some borders. It’s not necessarily a design I’d make, but it gives me other ideas about shapes and arrangements. I figure it’s worth sharing these designs too, in case they give other people ideas or inspiration!