olaf....

Image on the right is much much better. If you are going for super realism, you need to get the contrast between skin, eyes and teeth right. The following tone comparisions are for skin/eyewhite/teeth WITHOUT specular - but in a bright area.

From the studies I've done, if the figures cheecks are RGB (255, 175, 130) - ie. redder and brighter than in your image - then eyewhites would be around....210, 180, 165. So in your render, her eyewhites they are perhaps a little blue and a little too bright. Angelina Jolie is about the only reference model I've seen who has white eyewhites (ie. r=g=b) - almost everyone else has (r > g > b). Your render has (r < g < b).

So back on-topic - to her teeth. From a bunch of reference shoots, it seems that teeth are a relative color to a persons eyewhites - which approximately an RGB of approximately to the following formula (teeth R = eyewhite red + (0 to 20), teeth G = eyewhite R - 20, teeth B = eyewhite R - 30). Abviously peoples teeth vary depending on yellowness, lighting, if they are a smoker, etc. But your average hollywood superstar seems to conform to these figures.

So, back to your render - in you render, her eyewhites are around 230, 240, 250 (near the lacrimal), so matching teeth would be about 240, 220, 210 - and your are approx 210, 195, 165 - so the right color, but a little dark. But to me, the diffuse power of her eyewhites should be reduced to match her current teeth, and tinted red.

[rereads msg] Mmmmmm, that all sounds a bit complex, but hopefully will make sense. PS - you need to throw a bump map on the teeth to get the reflections right.

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