Hi Alexey,

The model is invisible since it has a material that has alpha set to 0. If you look in the ford.osg file all the material colors has alpha set to 0. When I look at the ford.mtl file I notice that the alpha component is missing for all colors and my guess would be that the obj plugin somehow defaults to alpha 0 when the alpha component is missing.

Regards,
Per

On 06/28/2011 03:44 PM, Alexey Chernov wrote:
Hi,

I suffer strange problem loading obj file in OpenSceneGraph (tried versions 
from 2.8.3 to 3.0 RC2). osgviewer starts successfully, prints nothing to 
console but don't show the model, only background is painted.

If I load the file in my code using


Code:

osg::Node* model = osgDB::readNodeFile(location);



the app just freezes and is unable to load the model, too. I tried many 
different *.obj files without any success, one of them is attached (it's sample 
from 3DSMax converted to *.obj). It can be loaded successfully in Blender and 
3DSMax.

Did someone face the same problem? I have really no idea what it can be. So any 
help would be highly appreciated.

Thank you!

Cheers,
Alexey

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http://forum.openscenegraph.org/viewtopic.php?p=40988#40988




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