Rhino export not happy

[claudio]

Hi,

First of all congratulations, great software.
I'm sure this must have come up already but i couldn't find any answer searching the forum:
When I export from Rhino as .obj i can't get it to separate objects, it all comes as one material. I have tried to assign different layers, materials and appearances in rhino but to no avail, what am i doing wrong?

I'm running Rhino 4, I have the demo octane.
Thanks

____
To elaborate on this, the suggested rhino settings in the other posts are for rhino 5, r4 doesn't have export settings, but i refer more to how should i prepare the mesh for export as different objects, not the obj. export settings if that makes sense?

[radiance]

does it create and MTL file next to the OBJ file it exports ?
is this file readable and not stored in a path with non-ascii characters ?

Radiance

[claudio]

Thanks Radiance,
It does create the mtl file, do i have to do something with it or is it supposed to integrate it automatically (sorry, never worked with .obj before)

[radiance]

octane should be able to read it.
if there's no materials coming thorugh either the `MTL file can't be found (it's on a path with non-latin characters),
or it simply contains only 1 material.

open the MTL file with a text editor to check.
also make sure you put both OBJ and MTL in the same directory with no special characters in the name(s).
also remove any path in the mtl reference in the OBJ file. (it's at the top of the obj file if you open it with a text editor)

Radiance

[claudio]

I'm not entirely sure why but it seems to work now, i wish i new what was i doing wrong in order to help some other newbie who reads this post..
Anyway, thanks a lot radiance for pointing me in the right direction.

[BillyRaygun]

I wonder if the issue I'm having is the same as this thread.

When I open the mesh file in Octane, my model comes in all black. The geometry is all the but everything is solid black. So black it almost looks like an alpha map.

Is this the same issue?

Regards,
Billy Raygun

[SamPage]

When I export from Rhino as .obj i can't get it to separate objects, it all comes as one material. I have tried to assign different layers, materials and appearances in rhino but to no avail, what am i doing wrong?

To elaborate on this, the suggested rhino settings in the other posts are for rhino 5, r4 doesn't have export settings, but i refer more to how should i prepare the mesh for export as different objects, not the obj. export settings if that makes sense?

With Rhino, the OBJ export doesn't care about layers, it only cares about material definitions. One thing to check if this happens again is to be sure that "Export material definitions" is check in the exporter. Both V4 and V5 export options have the ability to toggle this setting.

When I open the mesh file in Octane, my model comes in all black. The geometry is all the but everything is solid black. So black it almost looks like an alpha map.

Is this even with a very simple object, such as a sphere? If so, could you share the *.mtl file so we can see if something in there is going awry.

[BillyRaygun]

Based on your response to Claudio, I changed how I exported the mesh. Now, I have geometry I can see and render.