Is there an option to save the environment daylight ? (longitude / latitude / hour...)
Because I can save the render targets but even if I click on "save as default", I have to configure those options each time I open the autocad file.
You should use the AutoCAD sun - which will automatically set the Octane sun position. Does that solve your issue?
Other thing, In the material tab -> diffuse -> RGB color.
When I want to add a color to the editor via the button provided, the color is added but not saved when I re-open the rgb spectrum window.
You are right - and that is a limitation of using the standard Windows color picker. For the other plugins I have replaced this color picker with a "better" one, which I will do for the AutoCAD plugin. It does have "saving" of colors, but you can copy/paste the RGB node to do that.
Do you think it would be possible to render PolyFace Mesh with the plugin in the future ?
I will look at this Monday. The plugin uses some code supplied by Autodesk to get the vertices, however with AutoCAD 2014 this code crashes, so I might need to log a support call with Autodesk.
Paul