Overlapping hair strands

I just started building hair.

I begin to layer hair..a mix of prim, flexi amd sculptie. Why do some hair strands (when the camera moves around) seem to have flashes of transparency? How can I control that situation?

I'm going nuts over this!

If you take a closer look at other people's hair, you'll find that the upper portion is usually solid textures, and the alpha textures are reserved for separate lower prims. The alpha fighting you are running against is why people do it that way. You'll probably always have a little of that, the best you can do is spread it out so the interference is less likely (can't do much about other textures you walk near and so on).