Nipples, lapels, and collars

Now that I've mainly gotten my alpha channel lessons all done, I'm ready to move on a little. Anyone know the secret to making that erect nipple shadow on clothing? Also any hints on lapels and collars? I know it has to do with shadowing and stuff but I haven't figured it out yet. I tried out the add-ons someone made for wrinkles and layers but they only seem to add detail to the edges of things. It was made for PS 6 and 7 and I'm using PS 8 so maybe thats' the problem. Any help would be greatly appreciated!!!

The best way to figure out how to do realistic shadowing for things like nipple bumps is to find a good photograph that has the kind of look you're after. Magnify the nipple area and study it. How does the lighting affect the hue and saturation of the underlying material color? How do variations in luminosity suggest the underlying shape and how much variation is there? Make a new document and experiment with recreating what you see in the photo for a solid color fabric. Once you have that down to your satisfaction, try again with a textured and patterned fabric.

For collars and lapels, try just making the outline of it on the template, both front and back, until you have a guide that looks the correct shape when worn on your avatar. From there it's just a matter of adding shadowing. You can practice with the same techniques you used to do the nipple shaddow.

Tools to get familiar with...

dodge and burn tools (used to lighten and darken)
sponge (used to saturate and desaturate)
creating feathered selections and using levels, hue & saturation (both found under Image/adustments)

An alternate method for adding shadowing and wrinkles - once you have your main color layer done, duplicate the layer twice. Adjust one of the duplicates as if the entire layer was in shadow. Adjust the other duplicate as if the entire layer was in bright light. Create layer masks for each. Do them as "hide all." Then paint the layer masks to show the lighter and darker versions where you want your shadows and highlights. This allows you to work on your wrinkles and shadowing without altering your main clothing layer so you won't need to start over if you mess up

Thanks Chip, great tips as usual!