What happened to the clamshells?

This happened.

It pained me to chop off some of the clamshells, but it seemed like the right shape.  Here is a description of the different methods I tried, with links to the tutorials I found helpful.

Passacaglia Update

This is the current state of my Passacaglia.  I've never been one for following patterns, and those familiar with the Passacaglia will see that I've gone off piste and beyond the edges of the large Rosette.  I want to see if I can expand the pattern indefinitely.  Round and round.  A break between each round will be good for my sanity.

It's all Liberty and shot cottons.  I'm pausing for a while now while I decide on the next fabric.

Linking up with Jessica over at Life Under Quilts