jef

You can check on the forum that Houdini will not import .mtl information linked to the .obj.
I don't understand that choice from Sidefx as many programs handle obj/mtl actually.
One solution is to use the autodesk fbx converter and import the fbx file into houdini.

kuba
This is a quick and dirt way to create mtl files based on the primitive groups in your geometry. Use the supplied file naming convention (.$F.obj) or otherwise it won't work.

http://dl.dropbox.com/u/6454372/temp/OutputMtl.otl [dl.dropbox.com]

Thank you for your otl.
I will definitively have a try.

arctor
as usful as obj/mtl is as a utility file format it really isn't widely used in production with Houdini…

Yes it looks like they don't give to much attention at that issue since a long time.

arctor
and it wouldn't be too difficult to write a python node to read an mtl and spit out a bunch of materials based on the descriptions in the mtl file - but the materials you get will be pretty basic…

Unfortunately I'm not a programmer if someone can do that utility for exporting obj/mtl in a basic level it will be nice also.

But I repeat for those who can't afford paying a full license like me (I have apprentice HD)I will be rather happy to render my images directly into the Octane renderer which is dealing with obj/mtl.