It looks like Houdini is adding a "shop_materialpath" attribute whenever I export geometry as an Obj.

So when I import the geo back into another scene I have to either delete the attribute if I want Redshift to use he material path in the Geo node, or add a material SOP to override the attribute.

Is there a way to disable Houdini adding this attribute ?

Try using an attribute delete before you export to .OBJ.

hey, thanks.

yes off course, but I was kind of hoping for a preference setting somewhere. Why default add this attribute that can only cause issues later on ?

Smells like a bug to me...