>>4027884---MAXIMIZING BOOB-BODY RATIO
1. When you make a girl, make a version of her with maximum height, maximum width, and maximum boob size. Use the last tutorial to bring her along with your normal-sized version into Photoshop. The layer the taller one's on should be above the normal-sized one.
2. Make sure you have no selection and that the layer with the "Queen-Size" girl is highlighted In your Layers Pallette, click the icon at the bottom that looks like a white circle in a rectangle. This is the "Add layer mask" tool, absolutely indispensible in practically anything.
3. A layer mask can be used to hide parts of a layer. Sort of like erasing, but you can easily revert back to whatever you want later on. With whatever tool you use to manipulate the mask keep in mind that black will hide, white will reveal, and everything between offers some degree of transparency. Use this to hide everything but the Queen-sized girl's boobs.
4. Move them into place over your normal-sized girl. If you're going for the REALLY young look, then you may have to use Edit->Puppet Warp to make them fit on her chest.
---LACTATION
1. Make a new layer above your girl, then set its blending mode to "Screen" this lets brighter colors through while hiding the dark ones.Good for glowing objects. Keep in mind though, that because of this, milk won't show up as well on girls with lighter skin.
2. Take a 3-px white brush (assuming normal zoom levels) and draw several squiggles from the nipples along the curve of her breasts, to the bottom of each. It won't actually look like milk, but we're just making the trail it will go through.
2. Click Filter->Other->Minimum. Use a radius of 1 pixel. This will thin out the trails you've made, and make them look more like milk.
3. Mess with the layer's opacity to make the milk look more or less watery.