Also another thing you can try is in Rhino delete objects (so you have no objects but maintain the layers, unlike File > New) and use File > Import or Copy/Paste to bring in any objects you edited in MoI rather than using File > Open in Rhino.

You could test that and hopefully what might happen is objects on a layer that matched that name in Rhino would get assigned to that layer with the existing Rhino layer unchanged, but any objects assigned to new layers that you created in MoI would have the new layer created in Rhino for it to go on. I'm not sure if that's how it behaves or not though but it might. If it works like that, then that gives you another way to move stuff back and forth without disturbing your materials assigned by layer.

- Michael

Hi Michael,

re:
> Yup, you're right - sorry I got confused about this, I was looking at my most current 3DM code which behaves
> like I was describing but that's something I had changed just after the MoI 3.0 release.
> So the next version of MoI is set to behave like I was describing (MoI v4 will write a Rhino v5 3DM if it opened a v5 3DM)
> but MoI v3 does only write out Rhino v4 3DM files.
> ...
> ...
> Well, this is something that you can control - if you need to edit the style/layer list and need to preserve layer material transfer to and from Rhino,
> do not edit the styles in MoI, edit in Rhino and then you should be ok.
> ...
> ...
> Another way that could work for you would be to set up materials for rendering more at the end of your process
> after you've completed the models rather than doing it early on.
> ...
> ...
> Also another thing you can try is in Rhino delete objects (so you have no objects but maintain the layers, unlike File > New)
> and use File > Import or Copy/Paste to bring in any objects you edited in MoI rather than using File > Open in Rhino.

Thank's a lot for your technical and detailed help.
Much Appreciated.

Not a big problem, i hope, regarding the actual lack of MoiV3 to manage the .3dm V5 format.

It happens to me too, to get confused about the different versions of my source codes, when a customer ask me something....
And i guess that the core source code of Moi is a little bit huge....:)

I will follow all your suggestions and i'll make some tests as soon as possible.

Thanks again and nice day!

Marco.