nope. the technique used in the block pictured, the process is very straightforward.
the background square and contrasting square are cut the same size. the contrasting square is folded in half diagonally, the positioned on top of the background so it looks like a half-square triangle. (some instructions suggest pinning or basting the folded triangle in place so it doesn't shift while that patch is sewn to another.) those two pieces are sewn into the block as though they were one.
it looks pretty kewl, but you have to sew through at least 3 layers of fabric - possibly 6 - and hope everything stayes in place while you do it.