TODAY'S COOKING TIP:

Subtract two sigmoid functions to make
a delicious blurry step function.

Easy to make, and it will go with almost any dessert...

y  =  ς( (x+1) / blur )  -  ς( (x-1) / blur )

where:     ς(T) = 1 / (1 + e-T)

Drag the cursor upward to increase blur.

-Ken Perlin