zero variance is all copies of the same triangle tessellated together. By definition a non-zero variance has to introduce change in at least 1 triangle and in d

zero variance is all copies of the same triangle tessellated together. By definition a non-zero variance has to introduce change in at least 1 triangle and in doing so has to recalculate all connected triangles. It's hard to imagine how there couldn't be a strange blip when transitioning from zero to non-zero.