I use Victoria version 3 (poser 6). I dress her up with a thin shirt and a coat, but when I try this I see the shirt towards the coat. Is there a solution for this or is the only thing I can do, scaling, taping and morphing clothes, so it will fit? Because this part is very tricky.

Try the cloth room with collision settings against the 2nd cloth, or maybe you can see this only in the preview and not in the render

ok the simplest method of achieving the "layering" your after is to make the parts of the shirt you cant see...invisible! so for instance...you have a tight shirt on V3..then overlay a jacket...but maybe the shirts arms show through the jackets arms....so select the shirt arms and in the properties for it un-check the "visible" selection....the shirt arms will essentially still be in the scene but Poser wont tender it at all....it will depend greatly on how the clothing is "cut" how well this technique will work..but certainly for arms and legs and possible shoulders....this method will get you decent results 90% of the time..... remember that much of the time people settle for a certain amount of "glithces" in their renders...ie: clothing that shows through...skin peaking through clothing etc..... and then they " postwork" the glitches out in their chosen paint package.... personally i tend to get the clothing fitting as close as possible from the angle im viewing the model! if it dont fit from behind..hey what the hell...no-one will see that in the final image! LOL a combination of making sections of clothing invisible...you can also make sections of V3, or any figure in Poser, invisible as well...the clothing will still conform as if the part was there.....and postwork will get the results you need

Kirisute, I tried the method you describe, but I never get the 90%. Attached in this message is a simple poserfile with jessi wearing a shirt and an coat. I couldn't get this shirt fitting in the coat. Maybe someone give me a tip (see attachment) Postwork the glitches in photoshop is a way I can do it, but I prefer to fix this in Poser (change the extension to .zip because I couldn't upload any zip file)

You can also make a transparency map for the shirt. Black out areas that you do not want to see.

and you should change the link to a ZIP-file ;))