Quote - Noob Question How do you creat a tan line like that.

For this one specifically, I drew it in a program called Blacksmith3D-Paint my self, so it's a unique one that you can't find anywhere else (though you may find one like it).  Blacksmith-3D allows you to import a morphed (or unmorphed) character (after you exported it as an "obj" file from a 3D program), it's the easiest way to draw on a 3D object.  There are others but I don't know about them.  After I finished Blacksmith-3D, I did some finishing touches (smoothing/blending) in Paint Shop Pro.

For other tan line images that are out there already, I honestly don't know where there are any, but I do have a free one that I downloaded about 5 years ago, can't remember where I got it and I'm not allowed to distribute it (per licence).

As for just adding it on a texture via a paint program (such as Photoshop or Paint Shop Pro), after you save the tan line from Blacksmith3D-Paint (or download any others), resize it to your texture that you will apply it.  Add it via layer to your skin texture, highlight the non-tanned part, then click on the texture and hide the bikini image, darken the skin some.  Load the head and limbs textures as well, darken all of it the same way you did the torso texture.

If you just want to use the bikini texture in Poser, well... I don't know if you're experienced in the material room since you said "noob question", and it's a bit more difficult, but I'll explain as best as I can.  On the bikini image, the bikini part should be black while the rest should be white.  If you have a character with SSS loaded, then in the material room (with V4 selected in the preview pane), select "2_SkinTorso".  Find the "image" node containing the torso texture, go to the node that the torso texture is connected to (back step), follow the lines and make sure it's connected (directly or via other nodes) to the "scatter" node, this node is connected (directly or via other nodes) to "Alternate_Diffuse").  Click the connector (plug) to that node, select "new node" then "Math", then "Color_Math", that will disconnect the torso.  When that's loaded, click the arrow next to "add" and select "subtract" (next paragraph will explain why).   Click the plug to the first color (white), drag it to the torso texture, and plug it in.  Click on the plug to the second color (black), select"new node", then "2D texture", then "image map".  Load the bikini image in that node.  Click on the black color and select a dark grey color (this will depend on how dark you want the tan, if the tan's too dark or light, keep playing with that part)   Right click the top part of any nodes, select "select all, then right click again and copy.  Go to each of the other torso zones (SkinHead, SkinNeck, Nipple, & SkinHip), for each of them, delete everything connected to the main "material" zone, right click the top of the "material" zone and select "Paste".   For the face & limbs, repeat the first direction, but create a simple black image, this will make the rest of the body tan as well.  The disappointing part of this is that you won't notice anything till you render.

In my experience so far (and yes, I'm a little bit new at this as well), using "subtract" focuses on the white part of the bikini image and will turn the "tanned" part of V4 to a darker skin while leaving the "un-tanned" areas alone.  If you had "add", then it will invert the tan, making the bikini areas darker while leaving the others alone.  If the bikini image color was inverted (bikini white), it would invert the tan lines as well, only this time messing with the darkness of the outer skin while making the tanned part even brighter.  if you had "add" selected on the color math node, it would as well invert the tan, except the tanned part will be as non tan (same as original color brightness of the character), and the bikini part dark (same as what the tanned part is supposed to be).

It's odd, really, and I've yet to experiment a lot of areas of the material zones, honestly I need to play around with this more to really learn and try to teach anyone.  Bagginbills is... should I say... smarter then all of us, he's had sooooo much time to study Poser and have taught so many of us.  I would say sitemail him, but he's quite a busy guy, but if you can get his time, he'll be happy to teach you.

Ok, so that said, really if you're a noob in 3D, I wouldn't bother with this unless you really want to challenge yourself.  I'm 7 years experienced in 3D, 2 years in Poser and 7 in Daz Studio, and there are so many things to learn yet... so many!!!

I hope this helps, and I'm sure if any other experienced person read and study this, they would agree, but then they might have better ideas to get some tan lines.

BTW, sorry to say, but I won't distribute my own tan line either, it's gonna be a part of a character package, I'm making my character unique as possible and distributing my tan line will void some of the purpose.

...wolfie