I was planning on using solely satin stitches for each of the tangram sections. However, it soon become apparent that the cotton material was extremely thinly woven; as I worked, the previous stitches shrank in on themselves, and the crisp outline I wanted them to follow became uneven. In order to attempt rectifying this, I went back and tried to make bigger satin stitches to cover the ragged edges. This worked to some extent but it looked very messy, especially for the smaller sections. Eventually, I went back and simply attempted to mask the ragged sections with an outline of running stitches.

Moving forward on the larger sections, I tried to prevent these errors from happening again by making an "outline" before I moved on to satin stitches to block in a crisper outline and prevent the stitches from "shrinking" the fabric again. This helped immensely.