Hi Sirius, it turned out nicely!


> Since I mainly work with CAD software, architecture, I have
> a layer structure missing.

In MoI you can assign "Styles" to your various objects and then use the scene browser to turn on or off different styles similar to layers. For that use the scene browser:
http://moi3d.com/2.0/docs/moi_command_reference11.htm#scenebrowser


> I use the software for visualization GAMMA-RAY.
> To exchange data, I use 3DS.
> It would be helpful if MOI would export the colors as different materials.

Currently MoI only exports materials to the OBJ and LWO file formats. I do want to add it to 3DS in the future, but in general you should try and avoid 3DS format if possible since it is a very old format and limited in several ways, like a 16-bit limit on the number of points in a single mesh object and no support for vertex normals for transferring smooth shading information.

I'm not familiar with GAMMA-RAY but most rendering programs are able to use OBJ format, so if possible use OBJ rather than 3DS and you should probably get a better transfer including materials. You may need to set the "Output: Quads & Triangles" option when exporting out from MoI if GAMMA-RAY does not like to deal with complex n-gons.

- Michael