Hi Badwolf ...
For both points I must say, that I was going another way.
1) I only created ballet-tights. The Reason: on the original pictures of the leotard only white tights are used. I guess the transparent area in the back + a white full body suit do not make sense ...
The tights are a "second skin", in the true sense of the word. I duplicated the skin of the base mesh, then I cut off the toes and took the front of the ballet shoes (slightly decreased), after reconnecting the vertices, the tights were ready (I've only done one side, the other side is simply mirrored, you can see it, when you look at the texture. So these tights should not peek neither through the shoes, nor through the leotard (or nearly not). The human itself is nearly completely deleted in the lower body region (for explanation: read about the delete vertex group in the tutorial, you have to assign the faces on the human, which should be deleted when you create the clothes). For the texture I used an original skin, add a white layer + a checkerboard texture ... that's all. To get the effects in cycles render, you can use e.g. this setup for the tights:
2) Make up: if you add a second geometry for a makeup you will surely have problems. A geometry only should be used for a real mask, like these carnival masks for example.
For makeup we have 3 possibilities:
- the one of Mindfront is described in the tutorials. It is a generic one, which is, indeed, quite complicated ... You have different parameters for eye-liner, lips, cheeks ... you need to define masks, where you want the color etc.
- you may simply create a new skin ... okay for some eye-liner maybe a bit too much
- you create an extra layer in a graphic tool like GIMP or Photoshop
At least for b) and c) you always must paint something. My proposal is to use c). Simply open a skin texture in GIMP or PS and add another transparent layer. This layer is the layer, you have to paint the makeup. Because of the transparency you can see where you have to paint. Use something like an airbrush tool (I only know GIMP but PS will also supply all needed tools to do it). After all, switch off the original layer and save the makeup layer as a png-picture ...
For the skin in Blender simply change the setup using two textures like in the picture below. I used this method for the tattoos in the suicide girl images and I darkened the eyes also ... Btw.: the displacement part is not important for effect, I use it, to make her look more natural ....