rendering materials to mesh objects

import bpy FILE_PATH = "/home/vandy/startUpProjects/tailorMade/pythonScripts/" def library_get(name, data_blocks, libpath=None): """ Since it is possible for a .blend file to have several objects with the same name linked from different files, this routine lets us hunt down the right one. """ for x in data_blocks: if x.name == name and x.library is not None: if libpath is None or libpath == x.library.filepath: return x return None def addGroupToScene(grp, scn): for obj in grp.objects: scn.objects.link(obj) def linkMeshObject(): fname = "//remote.blend" print(fname) with bpy.data.libraries.load(fname, link=True) as (src, dst): # src has many properties, each of which is a list of name strings. # dst is how we specify what we want to link from the library file. # and the "omnitile" object dst.objects = ["Cylinder"] # just because we linked an object doesn't mean that object is in any of our scenes. omnitile = library_get("Cylinder", bpy.data.objects) scn = bpy.context.scene try: scn.objects.link(omnitile) # now it is. except: pass def linkMaterial(): fname = "//material1.blend" print(fname) with bpy.data.libraries.load(fname, link=True) as (src, dst): # src has many properties, each of which is a list of name strings. # dst is how we specify what we want to link from the library file. # and the "omnitile" object dst.materials = ["mainMaterial"] # just because we linked an object doesn't mean that object is in any of our scenes. omnitile = library_get("mainMaterial", bpy.data.materials) scn = bpy.context.scene print(len(scn.objects)) try: scn.objects.link(omnitile) # now it is. except: pass #Material is still not getting applied. Running the below code doesn't work either for obj in scn.objects: if obj.type == 'MESH': if obj.data.materials: # assign to 1st material slot obj.data.materials[0] = omnitile else: # no slots obj.data.materials.append(omnitile) linkMeshObject() linkMaterial() bpy.data.scenes['Scene'].render.filepath = FILE_PATH + 'test.png' bpy.ops.render.render(write_still=True)