Sky -
In order to fit to/conform items from one figure to another, DS and it's auto-fit tool (which is the conformer scripting), require clones to be installed. Those clones can be found on Daz's website. I have a LOT of clones, and can pretty much fit anything TO anything if I want to.
These are all the clones I have for Genesis 1 (this means I can take clothing items FROM these figures and auto-fit them to Genesis 1) :
Note that there are no such thing (clones) to allow converting items *TO* the Generation 3/4 figures. These clones only exist to convert items to and from Genesis, G2's, and G3's. I think by default, the clones that come with the figures are very minimal. If I remember correctly, Genesis only comes with clones for M4 and V4, and the G2's only come with clones for Genesis 1. I think. I don't remember exactly anymore. LOL I basically snap up anything that will allow me to expand out my wardrobe for Genesis figures, so I have added a LOT of clones to my installation over time.
Now, regarding auto-fitting of clothes from one figure to another --
Some items require more fiddling than others. And don't EVER expect long skirts/dresses to work very well. Sickle's got some REALLY nice templates and with her projection templates at least we can have some bones in the auto-fitted skirts/robes to help, but long skirts and dresses/robe type things (including.. trench coats, capes, cloaks...) these just do not convert well from one figure to another via the auto-fit. Much better running them through Crossdresser if at all possible, which is one of the reasons I was and still am SO annoyed that Evil Innocence never bothered to make a Genesis 1 license available for Crossdresser. I think he just assumed everyone could autofit EVERYTHING to G1, and with some stuff we really could have used a CD license.
A couple of tricks to use when autofitting clothing --
1. Run the clothing item through autofit so that it conforms to your figure.
2. Now go to the SCENE tab, and make sure the newly conformed item is selected.
3. Go to the top of your DS window.
4. Click on Edit --> Figure --> Geometry --> Add Smoothing Modifier
One you've done that, you now have a smoothing modifier in the clothing. This has a couple of fields that can be adjusted to help with the appearance of the autofitted clothing. You can increase the number of Smoothing Iterations, and you can also increase the number of Collision Iterations.
Smoothing modifiers are also really helpful with using hats/head covers over the top of SOME (not all) hairs, as well as really helpful with layering things like belts or sashes over the tops of robes/shirts/etc.
Another trick which can sometimes help with autofitting clothing - especially if it's older items - is to convert the item to Sub-D.
1. Run the clothing through autofit, get it conformed to the figure.
2. Go to the SCENE tab, make sure the newly converted item is selected.
3. Go to Edit --> Figure --> Geometry --> Convert to Sub-D.
The item will now have Sub-D which increases the mesh resolution and can allow for some more leeway in terms of how well it fits and tolerates bending and posing. You can adjust the Sub-D level in the Parameters tab, just like with the Smoothing Modifier.
WARNING!! -- Do NOT set the Sub-D up above 2! You will VERY likely crash Studio if you try to do that!
You can set your RENDER Sub-D as high as you like. But the View Sub-D pretty much maxes out at 2, and trying to go over that usually results in an immediate and enthusiastic crash of Studio.
This is where you find the Sub-D settings, once you've converted a mesh over to Sub-D :
And this is where you will find the Smoothing Modifier settings once you've added it to a mesh :
This is Blake - a Genesis 1 build - using the Genesis 3 Male "Chunky Knit Sweater" outfit, done via auto-fit and the extra clones I have to be able to auto-fit backwards (from new figures to old figure). I added Sub-D, which is set as a View Sub-D of 2 and a Render Sub-D of 4. I also added Smoothing Modifier, and have the Smoothing Iterations set to 6, and the Collision Iterations set to 4 :
Now, the above is obviously NOT rendered, but you can see even in the preview, it's taking to his bends pretty well.
Shoes can be a bit finicky at times; some convert better than others. NONE of Arki's shoes will ever convert very well, at least through Autofit. I also have a lot of issues with her clothing in autofit too, which is one of the reasons I don't use it much, or buy much of her stuff. If I can't depend on it being able to convert well, I pretty much don't buy it.
Adding smoothing modifiers CAN cause some lag in the scene, if you have the modifiers set up very high. If you experience any lag, just turn the smoothing modifier OFF (there's a button in the parameters of the items with these modifiers to let you do that), and you can just turn it back on when you're ready to render.
Likewise, items that use Sub-D can also be a bit hard on some screens in the viewport during scene building. If you're getting lag, you can go to the parameters and turn the Mesh Resolution back to "Base", then turn it back to "High Resolution" just when you're ready to render.
Both Sub-D and Smoothing Modifiers can and often DO increase render times, but I find that the increase is for the most part, usually minimal. Also note that both of these can sometimes "break" a mesh, so they are not a PERFECT solution, but they can help with fitting clothing sometimes.
Sub-D can also be VERY helpful with using older props; increasing the mesh resolution on these props can sometimes do a lot for the appearance of the mesh. Other times it will break the mesh. You just have to experiment with it and play around with the settings. Each item is a little different.
Oh - before I forget - if you try to add either Sub-D or a Smoothing Modifer to an item, and DS spits an error out, then most likely that item already has those modifiers added to it, and you just have to go to the Parameters tab to adjust them.
Hope this helps.