She credited a quilter in Wyoming for designing this pattern and "whimsically" calling it Painted Snowball.
"The most unusual design presents a good opportunity to use up scraps of gay prints left over from other quilts", wrote Nancy Cabot.
A copy of an old Painted Snowball pattern can be seen here. It was published in the Progressive Farmer. From what I can tell from this pattern, the block's center and four corner pieces were pieced and then appliqued to a 13" square of background fabric.
The quilt made according to the pattern would look like this. I like the look of this quilt but I didn't try to make the block. I don't think it's a great choice for a 6" block. Do you see the secondary pattern?
The Painted Snowball block can be found in Electric Quilt's Blockbase program as #3556.