With this one particular model, my textures always become faded out every time I leave projection master (and sometimes even part of the texture is missing). I tried everything with it, exporting it as an obj and reimporting it. What is wrong?
Caan you provide som einitial and final images so we can see? Can you tell us what you are doing so we know your steps? 
I entered Projection Master, selected the plane tool, set Z intensity to 1, selected the image I would use as the texture. Then I placed it over my model, and moved parts around to allign it with my model. I exited Projection Master, and this is what happenned. (for the image, i didn’t align it right this time but thats kinda irrelevent).
Does anyone know what’s wrong?
What material are you using before and after Projection Master? Are you saving the Material from PM?
Also, what is with the eye on lthe left. I t looks like a double eyelid. Iss that intentional?
Fast shader material, and i am not saving any mateerials.
Hmm. Just guessing, but t looks like you have one head inside of another.
Can you create a new layer and redraw the tool/head?
I dont know if this is the reason for your trouble but you should have the Zadd intesity at 0(not 1 as you mentioned), make sure the RGB doesnt have a small value and choose the right alpha.
Go to Tools/Masking and press Clear, then try your painting again. You may have inadvertently masked your model.
Cheers,
R
I think Rory is right on this one. Looks like you accidentally masked the model.
As far as I know if it would be masked nothing would appear after PM. Am I right?
Cleared the mask.
Alpha: Brush 00
RGB: 100
Z Intensity: 0
Basically teh same thing
Attachments
And here’s how it turuned out.
Is this from a single use of Projection Master, or multiple drops? I get a feeling that it’s the latter.
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Make sure that Shaded is turned off in the PM panel. You only use that for special situations. If it’s turned on, your texture will darken because ZBrush is also picking up information from the lighting and shadows.
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Some of your problems look like those caused by overlapping geometry. PM will apply color to EVERY surface that faces the camera – even those that are obscured by other surfaces. It’s a good idea to hide the parts of the model that you’re not currently working with.
I have tried this multiple times in Projection Master, during different sessions and even with different versions of the model (exporting and reimporting as obj). Shading and everything was off.
And i dont think it would be overlapping geometry, because this comes from a Poser head I exported and then modified in ZBrush. I don’t think e-frontier makes poorly modelled stock heads for their figures.
You misunderstood what I meant by overlapping geometry. Imagine a bi-plane veiwed from the top. The upper wings from that angle overlap and hide the lower wings. However, both wings have surfaces that face toward the camera. If you used Projection Master from that angle, both wings would receive texture on their upper surface unless you first hid the lower wing before dropping the model.
With a head, depending on your angle you can get cases where ears, chin and nose overlap other parts of the head. The result is that what you paint will appear in multiple places on the model. It looks like that has happened in your newer image.
As for e-frontier, almost all Poser models have overlapping UV’s. It’s Poser’s way of applying multiple textures to a single model. Overlapping UV’s mean that what you paint on one part of the model (like the eyes) will also appear on other parts of the model that share the same UV coordinates. Most Poser heads have overlapping UV’s for the eyes, eyelashes, mouth, and often even the eyebrows. To see what I mean, load your model and press Tool 
Texture Uv Check. Anything that turns shares overlapping UV coordinates with another part of the model.
Oh, I see. And how do I fix this?
Bump.
You need to rearrange your UV coordinates, so nothing is overlapping eachother.
Better yet - don’t do it in the first place. Start again. If it’s just a few areas use the smooth tool, it’ll pull the geometry back to something close to proper then resculpt tht area.