Now in a new layer above the watercolor layer, and drawing straight up, make a Linear Gradient going from black to transparency so that afterwards your canvas basically fades to black down the bottom.

I put all the bullet layers into a layer Group called Bullets, and then in a brand new layer above all the others, we draw a Radial Gradient going from White to Transparency as shown.

The insulation layer is extremely important to SOA because it allows transparency of database vendor products, OS platforms, information location, data format, and a physical data model.