They're TOO Deep.

That's why they are distorted.

They don't need to be that deep, and they should be deepened more from the middle, less from the edge.

I was able to improve the look a lot just by smoothing the nostril with Poser. However, re-modelling it will be much better.

Try not to stretch the visible polygons (the ones near the rim). Stretch the most inside polys a lot if you have to - nobody will see those.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)