This is an old problem, and may not have a decent solution. For my latest anatomy stuff, I need to show a cross-sectional view of gooey head innards. Trouble is, Poser handles the inside of a single-sided shape inconsistently. In the upper image (1) you can see the perspective properly. But in the lower image (2), which is the view I need, Poser turns the surface inside-out. Reversing winding order doesn't help. I know one definite solution: use Amapi to give the scalp a 'thickness' so that it's a closed object. Poser always handles closed objects better. But the scalp is too complicated, and Amapi goes crazy when it tries to set up a 'thickness'. I'll probably have to simplify it down to the point where Amapi likes it, but that's a lot of work and time. Any faster ideas? Any UVmapper tricks other than winding order?

Actually, this may be an optical illusion. I once saw similar in real life on a special on how the human eye perceives things and takes cues from lighting and shadow. Try altering your lights perhaps.

Maybe you could duplicate the scalp, reverse winding order, then scale it down slightly to make an inside surface? I don't know about the mouth, though.

Kudos for using the phrase "gooey head innards", by the way. Very Calvin and Hobbes. :)

Unfortunately, it's a bit deeper than lighting. There will always be some part of the concave object that looks wrong, even when the lighting makes one part look right. Maybe I'll just carve away the nose and ear, so that the remaining bits won't be so obviously wrong!

duplicate the scalp, reverse winding order, then scale it down slightly to make an inside surface? Good idea. I'll try it!

Perhaps using the grouping tool in poser to flip the normals for the skin and lips materials would give the effect you're looking for Chris Cox

Rather than scaling it down, try using a constant colour displacement map in UV mapper pro to create an equal amount of displacement over the whole surface. You might be able to create an even thickness inner wall that way.

By jove, Ajax, I think you've just given me the excuse I was looking for, to buy UV pro!

It's a great app. Even if the displacement thing doesn't work, you won't regret it - and Steve is finally back at work on version 3 after about 9 months off because of his house burning down. I think the version 3.0 upgrade is going to be free for owners of 2 and it looks like it's going to have some great features.

Carrara retains the UV-mapping if the created thickness is low, like about .001 in.

If you do decided to buy UVMapperPro (and you really should, it's excellent), it has a function to make facets two-sided (it's under the Tools menu). I think that might help. At the very least it'll make the head easier to look at in Poser's display window ;) - Graham

Don't forget to put in the little dangly thing that hangs down at the back of the throat. Love esther

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Dr Geep reposted a tute just a bit ago. Page 8 looks like it explains a quick, easy, free way to do this. basically, just export every thing as a prop, then import it with normals reversed, then export it again. On second thought, I think you'll lose the textures this way...

Oh that is good news Ajax. I've been waiting for news on UVMapper. It's such a great program! And a free upgrade would be even cooler :D

Well, I tried all those suggestions and none worked. Turns out that I need to slice the scalp into two parts anyway to make chewing show properly. Morphing won't do the job. So I'll leave out the nose and ear, and make the upper part a bit more "schematic". There must be an intrinsic topology problem with the nose; one of those Escher things where the renderer just can't decide what's in or out. (Amapi's internal renderer had the same problem.) Anyway, many thanks for all the suggestions. EnglishBob's idea came closest to working.