Zbrush | Adding geometry to existing model with mesh fusion

There is another common way this IMM Mesh fusion is used, which is for adding geometries onto your existing models. For example, I have here a Sphere3D which is subdivided three times. I applied a Star mask on the Sphere3D. Then activate IMM PrimitiveH on the sphere polygroup the masked area to create an edge. Apply Insert whole cylinder on top of the star polygroup. Click and drag left to scale it and move it outwards. CTRL CLICK and DRAG down twice and Mesh fusion will do its thing