Ok, I took pictures of the back sides to show how the back 'swills' with seams all together at one point; not sewn in the one fourth seam allowances where points meet.
[ATTACH=CONFIG]586013[/ATTACH][ATTACH=CONFIG]586014[/ATTACH][ATTACH=CONFIG]586015[/ATTACH]These 'place mats' were from the Quilting on the Square quilt shop in Holton, Kansas. When signed up for their emails, they send out free paper piecing patterns developed by them. The last picture is one of the 50 paper piecing stars I finished that shows the seams pressed open, again without sewing the last one fourth seam allowance where all points meet.

This online craftsy quilting class explains this and other piecing techniques very well Piece like a pro https://www.craftsy.com/search?query...like%20a%20pro
Wait for a sale or sign up for the trial unlimited classes new thing.